2013 weather summaries Llanwnnen

January 2013

Slightly cold overall; snowy spell 18^th – 25^th; rainfall near average

Mild early and late with a cold, snowy spell between. No extreme temperatures. Much of the rain fell in the final week.

1^st – 8^th: Mild and quite dry but cloudy. The start of the year saw benign, quiet mild weather after all the rain and wind of December! Atmospheric pressure reached 1038mbar its highest level since last May. There was some drizzle at times,.

9^th - 14^th : Rather cold and unsettled, rain or showers at times. Dry, sunny intervals between, and with some clear, frosty nights, down to -4.7c 13^th.

15^th - 25^th: Cold to very cold, mainly cloudy, sleet or snow at times. Not your classic bitter Winter cold spell, temperatures never got below -3c with the persistent cloud cover, however it was quite snowy. Heavy sleet turned to snow on the 18^th giving a 9cm covering, while higher up in the nearby Carmarthenshire hills level snow was hard to estimate due to drifting, but was at least 15cm deep. The snow cover then lay for over one week as temperatures remained low throughout, never getting much above +3c, and with just a gradual thaw. There was only a little further snow after 18^th at Lampeter, unlike some parts of SW Wales which were hit badly again 23^rd. The sun came out at long last on the 24^th after 8 successive generally overcast days! The thaw arrived with heavy rain and strong winds the following day.

26^th – 31^st: Mild to very mild, very unsettled and windy. Periods of rain and showers, heavy at times. Thunderstorms with vivid fork lightning evening of 26^th. Temperatures peaked at 11.4c 29^th,

Total rainfall: 119.9mm

Wettest day: 20.2mm 26^th

Rain days >0.2mm: 23
Wet days >1.0mm: 17
Days of heavy rain >10mm: 5
Mean temperature: 4.0c

Mean Max: 6.3c

Mean Min: 1.7c

High Max: 11.4c 29^th
Low Max: 0.6c 18^th
High Min: 8.9c 8^th
Low Min: -4.7c 13^th

Air frost: 16

Ground frost: 18

Ice day (max below 0c): 0

Mean RH: 90% approx

High RH: 100% various dates
Low RH: 67% 24^th

Predominant wind directions: SSE
Mean wind speed: 2.0mph
Mean pressure: 1012mbar
Max pressure: 1038mbar 4th
Min pressure: 988mbar 27th

Days with:

Hail: 2
Gale: 1
Thunder: 1

Lightning only: 1

Snow or sleet: 11

Snow lying 0900: 8
Fog: 2

Fog at 0900: 1

February 2013

Rather cold and quite dry

All the rain fell in the first half, with no measurable rain after the 13^th. Quite a cold month but with no especially cold weather, nor was there any snow.

1^st – 10^th: Unsettled with rain and showers at times, some hail, and a thunderstorm on the evening of the 4^th. Temperatures variable from rather cold to mild, with some slight frosts. There was a gale in the early hours of the 6^th.

11^th – 13^th: Brief cold snap but without frost and mostly dry, maxima 4c. Heavy rain with mild air arrived late 13^th.

14^th – 19^th: After heavy rain in the early hours of the 14^th this was a dry and mild spell. Sunny intervals, with the 17^th to 19^th being very sunny. Foehn effect from the nearby hills 18^th and 19^th with low humidity and dew points. 19^th was an incredible sunny day starting with a hard frost, low of -6c, followed by a mild afternoon, RH just 39% and dew points down to -2c mid afternoon. In fact the 19th saw both the coldest and mildest readings of the month!

20^th – 28^th: Dry, cold to rather cold: High pressure first over Scandinavia later moved over the UK, a rather cloudy spell with some sunny spells, although the 21^st was a sunny day. Some quite sharp frosts when the cloud cleared, down as low as -5c. Last day saw quite a mild afternoon between frosts. The final 15 days of February were dry, making this the first 'absolute drought' since April 2010 (17 days).

Total rainfall: 67.7mm

Wettest day: 24.9mm 13^th

Rain days >0.2mm: 11
Wet days >1.0mm: 10
Days of heavy rain >10mm: 1
Mean temperature: 3.3c

Mean Max: 6.8c

Mean Min: -0.1c

High Max: 11.5c 19^th
Low Max: 1.6c 22^nd
High Min: 6.1c 4^th
Low Min: -5.9c 19^th

Air frost: 12

Ground frost: 17

Ice days (Max below 0c): 0

Mean RH: 86%

High RH: 99% 3^rd
Low RH: 39% 19^th

Predominant wind directions: North
Mean wind speed: 1.4mph
Mean pressure: 1017mbar
Max pressure: 1037mbar 27^th
Min pressure: 989mbar 10^th

Days with:

Hail: 3 (1)
Gale: 1
Thunder: 1

Snow or sleet: 5

Snow lying 0900: 0
Fog: 0

Fog at 0900: 0

Winter 2012/13

Rainfall total 444.7mm (rather wet)

Wettest day 27.2mm Dec 22^nd

RD 61

WD 51

Heavy rain >10mm 17

Sleet or snow 17

Snow lying 0900 8 (all Jan, max 9cm)

Thunder 2

Lightning only 1

Fog 5 (2)

Hail 9 (1)

March 2013

Very cold and frosty; above average rainfall

Probably the coldest March locally since 1962, this was also the coldest month of Winter 2012/ 13! This in spite of a reading of 16c on the 5^th. High frequency of frost and sleet or snow, although the latter was in generally very small amounts. -10.2c the coldest night of the month, in itself not unusually low for this month. It would have been quite a dry month were it not for over two inches rain falling in 24 hours 21^st – 22^nd. The first fortnight had just 6mm following on from the very dry second half of February. No measurable rain during the last 9 days.

1^st – 5^th: Dry with sunny spells but frosty nights. Variable maxima from rather cold to very mild. Big variation on the very clear/ sunny 5^th from -5.5c to 16c.

6^th – 9^th: Mild and mostly cloudy with a little light rain and drizzle at times.

10^th – 14^th: Mostly dry and cold with sunny spells, and some snow flurries. Hard night frosts, -10.2c on the 14^th which then reached 8.4c.

15^th – 20^th: Rather cold and unsettled with rain or wintry showers and slight night frosts. Very heavy snow showers on the afternoon of the 16^th gave a 3cm covering and led to the latest day of snow lying since April 2008.

21^st – 31^st: Very cold/ cold: Heavy rain and strong winds 21^st and 22^nd with 53mm in 24 hours. Thereafter mainly dry bar the odd light snow flurry. Sunny spells with chilling east winds, air frost each night from the 24^th these severe at times, down to -8.4c 28^th.

Total rainfall: 95.3mm

Wettest day: 30.0mm 21^st

Rain days >0.2mm: 10
Wet days >1.0mm: 9
Days of heavy rain >10mm: 4
Mean temperature: 3.1c

Mean Max: 7.5c

Mean Min: -1.4c

High Max: 16.0c 5th
Low Max: 1.1c 24^th
High Min: 7.7c 7^th
Low Min: -10.2c 14^th
Air frost: 21

Ground frost: 20

Ice day (Max below 0c): 0

Mean RH: 80%

High RH: 98% 5^th
Low RH: 44% 31^st

Predominant wind direction: ENE
Mean pressure: 1008mbar
Max pressure: 1031mbar 1^st
Min pressure: 987mbar 18th

Days with:

Hail: 1
Gale: 0
Thunder: 0

Snow or sleet: 13

Snow lying 0900: 1
Fog: 1

Fog at 0900: 1

April 2013, Lampeter, West Wales

Cool and quite dry

A high incidence of frost for April, with 11 air frost, and some severe frosts during the first week. Lack of really wet weather excepting the 13^th.

1^st – 9^th: Dry with frosty nights. Very cold 1^st, max just 4.4c, then cool to average temperatures by day, however some hard frosts, notably -8.5c 6^th. Plenty of sunshine, some days a unbroken sunshine.

10^th – 18^th: Unsettled and windy with rain or showers, wet 13^th with 23.5mm. Very windy at times with a gale on the 17^th. Temperatures around average.

19^th - 20^th: High pressure, dry and sunny. Large temperature range 20^th from -3.3c to 15.1c.

21^st – 28^th: Changeable and often cool with small amounts of rain at times. However the mildest day of the month was 23^rd at 16.4c. Limited sunshine and quite windy at times.

29^th – 30^th: Dry and quite sunny but rather cool and breezy still.

Total rainfall: 64.7mm

Wettest day: 23.5mm 13th

Rain days >0.2mm: 15
Wet days >1.0mm: 10
Days of heavy rain >10mm: 1
Mean temperature: 6.6c

Mean Max: 11.5c

Mean Min: 1.8c

High Max: 16.4c 23^rd
Low Max: 4.4c 1^st
High Min: 10.6c 14^th Low Min: -8.5c 6^th

Air frost: 11

Ground frost: 16

Mean RH: 75%

High RH: 99%
Low RH: 35%

Predominant wind directions: SSE
Mean wind speed: 2.7mph
Mean pressure: 1014mbar
Max pressure: 1034mbar 20^th
Min pressure: 991mbar 12^th

Days with:

Hail: 2
Gale: 1
Thunder: 0

Snow or sleet: 1

Snow lying 0900: 0
Fog: 0

Fog at 0900: 0

May 2013

Cool and quite wet

Often cool, the occasional above average day or two, frequent frosts High frequency of hail and fog (although the latter never latter until 0900)

1^st – 3^rd: Dry and sunny with night frosts, -2.9c 1^st very low for May. Fairly warm 2^nd max 17c.

4^th – 5^th: Rain early 4^th otherwise dry but rather cloudy with average temperatures.

6^th – 7^th: Warm and sunny, 23c on the latter the highest of the month with ease

8^th – 13^th: Often cool, unsettled and windy with rain or showers, some with hail, at times, gale force winds with some heavy rain 9^th

14^th – 15^th: Very cool and very wet, two inches of rain credited to the 14^th, which was notably cool for May, blobs of sleet in the very heavy rain overnight. Max just 8.2c 14^th.

16^th – 17^th: Cool and showery, some hail, night frosts

18^th – 22^nd: Dry and rather cool with some sunny spells, ground frosts

23^rd -24^th: Very cool windy with some showers and hail

25^th – 26^th: Dry and sunny with overnight frosts. Exceptionally low minima for the end of May, average temperatures by day

27^th – 28^th: Mainly cloudy and very cool with rain at times, heavy 27^th with a high of just 9.8c.

29^th -31^st: Mostly dry with sunny spells and around average temperatures.

Total rainfall: 124.7mm

Wettest day: 47.3mm 14th

Rain days >0.2mm:
Wet days >1.0mm:
Days of heavy rain >10mm: 3
Mean temperature: 9.1c

Mean Max: 14.2c

Mean Min: 3.9c

High Max: 23.1c 7th
Low Max: 8.2c 14^th

High Min: 10.7c 8^th
Low Min: -2.9c 1^st

Air frost: 5

Ground frost: 13

Mean RH: c 80%

High RH: 99% various dates
Low RH: 29% 7^th

Predominant wind directions: NNW
Mean wind speed: 2.9mph
Mean pressure: 1013mbar
Max pressure: 1027mbar 1^st
Min pressure: 989mbar 15^th

Days with:

Hail: 8
Gale: 1
Thunder: 0

Snow or sleet: 2

Snow lying 0900: 0
Fog: 6

Fog at 0900: 0

June 2013

Dry with near average temperatures

With just 2 inches rainfall this was the driest June since 2010 (41mm), only one day having above 10mm (13.6mm 27^th). A warm, dry and sunny first 10 days, was followed by a changeable pattern of westerly winds and some rain at times. Nothing terribly spectacular temperature wise either, although it dropped to below 2c on the 25^th with a late grass frost.

1^st – 10^th: Dry, very sunny and warm/ very warm. H pressure over or close to the UK, plentiful clear skies and sunshine for West Wales compared with the East! The first two days were cool but then maxima were between 20 and 25c. Several days had virtually unbroken sunshine. Nights were cool even with grass frosts 2^nd to 4^th.

11^th – 16^th: Atlantic lows brought much cooler and changeable conditions, rain or showers at times, and strong winds at times too, especially 14^th.

17^th – 19^th: Rather warm and mainly dry with sunny spells.

20^th – 23^rd: Unsettled with some rain or showers at times, but no large amounts, became quite cool and windy over the weekend of 22^nd / 23^rd.

24^th – 26^th: Dry with sunny spells and near average temperatures, chilly nights.

27^th: - 28^th: Unsettled with rain at times, a little sunshine

29^th – 30^th: Dry with some sunshine, not so warm though.

Total rainfall: 50.1mm

Wettest day: 13.6mm 27^th

Rain days >0.2mm: 13
Wet days >1.0mm: 9
Days of heavy rain >10mm: 1
Mean temperature: 13.3c

Mean Max: 18.7c

Mean Min: 7.9c

High Max: 24.8c 7^th
Low Max: 12.7c 23^rd
High Min: 12.7c 30^th
Low Min: +1.8c 25^th

Air frost: 0

Ground frost: 4

Mean RH: 82%

High RH: 98% various
Low RH: 29% 7^th

Predominant wind directions: WSW
Mean pressure: 1018mbar
Max pressure: 1033mbar 3^rd
Min pressure: 1002mbar 23^rd

Days with:

Hail: 0
Gale: 0
Thunder: 0
Fog: 4

Fog at 0900: 0

July 2013

Very warm, very sunny and dry

This was a fine and sunny Summer month, the warmest of any month since July 2006, also with the highest temperatures since that hot month when it reached 33.6c. The rather rare occurrence here in West Wales of the mercury exceeding 30c. Large amounts of sunshine and a prolonged dry spell lasting 20 days, a rather wet last few days not redressing the balance, it was the driest July since 2006 (30.4mm)

1^st – 3^rd: Cool, a little sunshine with a little rain and drizzle at times, warmer 4^th.

4^th – 6^th: Building pressure, warmer, dry with some sunshine after fog and low cloud. Clear and chilly by night

7^th – 22^nd: Dry, very warm/ hot and very sunny., thanks to high pressure stuck firmly over or close to the UK. An outstanding fortnight plus of heat and sunshine, most days having above 10 hours sun. Maxima consistently above 24c with the exception of 16^th (22.6c), and hot at times. Hottest day being 30.1c 19^th , while it exceeded 26.6c (80f) on 7 days. Nights for the most part clear and refreshingly cool, regularly dropping below 11c, although it only fell to a sticky 16c on 22^nd. Some mornings experienced fog which always cleared by 0900.

23^rd – 27^th: Mostly dry and warm with sunny intervals. A gentle let down from the heat! With more cloud, nights were often warm at around 16c, while highs were a more pleasant 24c. The first rain for weeks arrived during the evening of 24^th only amounted to 3.5mm, and was followed by a further mostly dry couple of days.

28^th – 31^st: Cooler and unsettled with rain at times. A proper cool down to nearer average levels, some rain and showers each day, a solitary clap of thunder 29^th. Half inch of rain 28^th made it by far the wettest day of this dry month. Much cloudier but with still with sunny intervals. Final day and it was the first sub 20c maximum since July 6^th.

Total rainfall: 40.6mm

Wettest day: 12.5mm 28^th

Rain days >0.2mm: 8
Wet days >1.0mm: 7
Days of heavy rain >10mm: 1

Longest dry spell/ drought: 20 days 4^th - 23^rd
Mean temperature: 17.4c

Mean Max: 23.9c

Mean Min: 10.8c

High Max: 30.1c 19^th
Low Max: 14.7 2^nd
High Min: 16.1c 23^rd
Low Min: 5.4c 7th

Estimated sun (from 5 minute webcam captures) : 278 hours – very sunny

Sunniest day: 15 hours various dates

Air frost: 0

Ground frost: 0

Mean RH: 81%

High RH: 98%
Low RH: 33%

Predominant wind directions: North

Roof anemometer installed (Davis linked to Vue)
Mean wind speed: 3.4mph

Max wind gust: 2mph 28th
Mean pressure: 1020mbar
Max pressure: 1035mbar 8th
Min pressure: 1002mbar 2^nd

Days with:

Hail: 0
Gale: 0
Thunder: 1
Fog: 5

Fog at 0900: 0

Total rainfall:

Wettest day:

Rain days >0.2mm:
Wet days >1.0mm:
Days of heavy rain >10mm:

August 2013

A typical Summer month

Rain and temperatures were close to average, no real extremes of temperature and much of the rain fell in the first half, the second half being mostly dry. Sunshine was slightly below average (estimated). Unlike July, there was an absence of heat, no day exceeding 26c.

1^st – 3^rd: Warm and breezy with sunny intervals and a few showers, nearby thunder on evening of 2^nd

4^th – 5^th: Cloudy and cool with spells of rain, some heavy, windy 5^th, however nights were mild.

6^th – 8^th: Mostly dry and rather warm with sunny spells.

9^th – 13^th: Mostly dry but rather cool with limited sunny intervals. Breezy. Very cool night 12^th down to 5.2c

14^th – 16^th: Mostly cloudy with rain at times, some very heavy bursts (28.5mm 15^th), Average to warm with the warmest night of Summer 14^th, minimum 16.5c.

17^th – 21^st: Mostly dry with sunny intervals and average temperatures.

22^nd: Very warm and sunny

23^rd –28^th : Mostly dry with sunny spells, temperatures around average, but warm and sunny, max 23.2c 26^th and cool max 17.4c 24^th - the lowest level since early July. Foggy during some early mornings.

29^th -31^st : Mostly dry and breezy, limited sunshine except for 31^st, rather warm, except 31^st which was rather cool, coolest maximum of the month at 16.7c.

Total rainfall: 81.9mm (91%)

Wettest day: 28.5mm 15^th

Rain days >0.2mm: 14
Wet days >1.0mm: 11
Days of heavy rain >10mm: 2

Max rate: 52mm/hr 16^th
Mean temperature: 15.8c

Mean Max: 20.4c

Mean Min: 11.1c

High Max: 25.7c 22^nd
Low Max: 16.7c 31^st
High Min: 16.5c 15^th
Low Min: 5.2c 13^th

Estimated sunshine: 141 hours (89%)

Max sun: 11 hours 26^th

Days without sunshine: 2

Air frost: 0

Ground frost: 0

Mean RH: 82% (estimated)

High RH: 99% various
Low RH: 44% 22^nd

Predominant wind directions: WSW
Mean wind speed: 4.0mph

Max gust: 39mph 5^th
Mean pressure: 1017mbar (estimated)
Max pressure: 1028mbar 20^th
Min pressure: 1003mbar 2^nd

Days with:

Hail: 0
Gale: 0
Thunder: 1
Fog: 4

Fog at 0900: 0

September 2013

Averaged out September was an average kind of month with no extremes at all. Rainfall was a little below average while temperatures were about average. However both the first few days and last 10 saw plenty of dry and warm weather, with all but a fraction of a millimetre of the total rain falling in the fortnight from 6^th to 19^th. There was just the sole grass frost, only one day had hail, no gales nor thunder and limited fog.

1^st – 5^th: Dry and quite warm with sunny spells, the month's highest reading of 23.7c was on 4^th

6^th – 20^th: Unsettled and mostly cool with rain at times. Heavy rain overnight 8^th gave 29mm, the wettest day of the month. At times it was very cool, notably on the 18^th which was the coolest day of the month with a max of just 13.2c, although it failed to reach 15c on 4 other days. A rather poor spell for sunshine with no day exceeding an estimated 6 hours. The first ground frost of Autumn occurred on the night of 15^th down to 1c.

21^st - 30^th: Mostly dry and generally warm, some sunny intervals. High pressure close to the UK with 3 days of 21^st to 24^th exceeding 22c, very warm for late September, the highest being 23.6c 23^rd (Trawsgoed reached 25c). The only cool day was the high of 15.6c 26^th an overcast day as a weak cold front temporarily cooled things. The mildest nights of the month occurred during this spell, both 22^nd and 23^rd having minima of 15.1c. Even without the direct influence of high pressure after 24^th it remained mainly dry to the month end

Total rainfall: 85.7mm

Wettest day: 29.0mm 8^th

Rain days >0.2mm: 13
Wet days >1.0mm: 10
Days of heavy rain >10mm: 3
Mean temperature: 13.7c

Mean Max: 18.1c

Mean Min: 9.3c

High Max: 23.7c 4^th
Low Max: 13.2c 18^th
High Min: 15.1c 22^nd / 23rd
Low Min: +0.8c 15^th

Est sun: 103 hr

Max sun: 8.5 hr 3^rd / 4^th

Days no sun: 4

Air frost: 0

Ground frost: 1

Mean RH: 83%

High RH: 100% vs
Low RH: 45% 4^th

Predominant wind direction: WSW
Mean wind speed: 3.1mph

Max gust 31mph 15^th
Mean pressure: 1015mbar
Max pressure: 1032mbar 1^st
Min pressure: 995mbar 17^th

Days with:

Hail: 1
Gale: 0
Thunder: 0
Fog: 4

Fog at 0900: 1

October 2013

Very mild, rather cloudy and very wet

This was the wettest October since 2008 (222mm) and a consistently mild month with nights especially mild, the mean minima was above 10c up to 26^th. Maxima although mild were unexceptional, with no date reaching 20c. Although very unsettled and windy at times, this part of the country missed the gales that affected some other areas towards the month end.

1^st – 8^th: Mild and unsettled with rain or showers at times, limited sun, some dry interludes, breezy. Especially mild by night, the mildest night of the month was the 4^th minimum 14.8c, with 5 nights remaining above 13c.

9^th – 12^th: Cool and mostly dry but rather cloudy although bright 10^th. Quite windy at times.

13^th – 14^th: Cool and showery with sunny intervals

15^th – 27^th: Mild/ very mild and very unsettled with rain at times, some heavy. Heavy rain 21^st with 29mm credited to 20^th; 7 of the 8 days 20^th - 27^th having above 10mm. Strong winds at times but never quite attaining gale force, the highest gust of the month being 39mph 25^th. 18^th to 26^th (9 consecutive nights) all very mild above 10c.

28^th – 31^st: Further rain at times, cooler, sunny intervals. Season's first air frost 30^th Min -0.6c.

Total rainfall: 214.2mm

Wettest day: 29.5mm 20^th

Rain days >0.2mm: 26
Wet days >1.0mm: 21
Days of heavy rain >10mm: 10
Mean temperature: 12.1c

Mean Max: 15.0c

Mean Min: 9.2c

High Max: 19.2c 2^nd
Low Max: 10.7c 30^th
High Min: 14.8c 4^th
Low Min: -0.6c 30^th

Estimated sun (from 5 minute webcam captures): 64 hours

Max sun: 7 hrs 10^th

Days no sun: 2

Air frost: 1

Ground frost: 1

Mean RH: 91%

High RH: 99% various
Low RH: 60% 10^th

Predominant wind directions: SW
Mean wind speed: 5.4mph

Max speed: 39mph 25^th
Mean pressure: 1010mbar
Max pressure: 1026mbar 8^th
Min pressure: 982mbar 28^th

Days with:

Hail: 0
Gale: 0
Thunder: 0
Fog: 3

Fog at 0900: 0

November 2013

Slightly cold; unsettled to 20^th then mostly dry

Although unsettled for the first 3 weeks there were no very wet periods and so the total for the month given the dry latter stages was a below average 111mm. Nothing exceptional temperature wise, a lack of particularly mild weather but there were some hard frosts.

1^st – 14^th: Unsettled with rain or showers at times, some heavy. A typical mixed period there were sunny intervals but only short dry spells between the rain systems. Temperatures around average to quite cool and with slight frosts at times. Only two days reached the mild category, the mildest reading of the month being 14.2c on the 11^th. Windy at times with gales 2^nd and a gust of 51mph. In spite of high pressure of above 1030mbar arriving on the 12^th the unsettled conditions were not stemmed until 15^th.

15^th – 17^th: High pressure close by to the SW gave a generally dry few days although it was mainly cloudy. Temperatures average to mild.

18^th – 20^th: Turned rather cold and showery, plenty of hail showers and strong winds. Some sunny breaks.

21^st – 26^th: Dry and rather cold with some hard frosts. High pressure re-exerted with still inversion conditions prevailing. Severe frost on the night of the 23^rd down to -7.3c (colder than any official UK station), this was only the lowest November figure since November 29^th 2012. Pressure peaked at 1042mbar 26^th the highest level since February 2012 (1043mbar)

27^th – 30^th: Mostly dry with around average temperatures, cloudy apart from the final day of the month which saw an unbroken 7 hours - being the highest estimation of November.

Total rainfall: 111mm

Wettest day: 13.2mm 1^st

Rain days >0.2mm: 20
Wet days >1.0mm: 16
Days of heavy rain >10mm: 4
Mean temperature: 5.8c

Mean Max: 9.3c

Mean Min: 2.2c

High Max: 14.2c 11^th
Low Max: 5.7c 24^th
High Min: 7.3c 16^th / 18^th
Low Min: -7.3c 23^rd

Est sun: 62hr

Max sun: 7 hours 30^th

Days no sun: 9

Air frost: 7

Ground frost: 16

Ice days (max below 0c): 0

Mean RH: c 84%

High RH: 100% various
Low RH: 66% 4^th

Highest wind gust: 51mph 2^nd
Mean pressure: 1018mbar
Max pressure: 1042mbar 25^th
Min pressure: 986mbar 4^th

Days with:

Hail: 4
Gale: 1
Thunder: 0

Snow or sleet: 1

Snow lying 0900: 0
Fog: 1

Fog at 0900: 0

December 2013

Mild, very wet and quite dull

In spite of the first 11 days only having 7mm rain the rest of the month was very wet totalling 258.7mm. It was slightly wetter than Dec 2012 (257mm) and the wettest month since Nov 2009 (309mm). Plenty of mild weather and nothing especially cold, the coldest night being a mere -2.2c with fewer than normal frosts. However there was also a lack of notably mild weather as the highest reading was just 12.3c (15^th). With the very unsettled and often showery nature hail featured on 9 days. The wettest and windiest weather occurred 14^th to 27^th when gale force gusts were common and 200mm fell in this fortnight alone

1^st – 7^th: High pressure dominated plenty of dry weather just some light rain at times. Temperaturs close to average and a mostly cloudy spell.

8^th – 12^th: Mostly dry and high pressure dominated still, mild with some sunny intervals.

13^th -16^th: Unsettled but very mild; cloudy and often windy with spells of rain, some heavy

17^th –27^th: Very unsettled and disturbed with a succession of deep lows crossing the Atlantic towards the UK. Often windy, gales at times with frequent rain or showers, often heavy and with hail. 18^th and 23^rd both getting over 30mm rain with localised flooding. 5 days in this spells saw wind gusts exceeding 50mph, strongest gust of 60mph on the 23^rd. Thankfully the Festive period saw a brief respite. Sunshine continued at a premium although most days saw a few sunny intervals.

28^th – 29^th: Mainly dry with sunny spells and night frosts and less windy

30^th – 31^st: More heavy rain, localised flooding and strong winds; some sunshine and quite mild

Total rainfall: 258.7mm

Wettest day: 35.3mm 18th

Rain days >0.2mm: 24
Wet days >1.0mm: 21
Days of heavy rain >10mm: 11
Mean temperature: 6.1c

Mean Max: 9.1c

Mean Min: 3.0c

High Max: 12.3c 15^th
Low Max: 5.3c 25^th
High Min: 10.2c 13^th
Low Min: -2.2c 11^th/ 26^th

Est sun: 36hr

Max sun: 4.5 hr 29^th

Days no sun: 11

Air frost: 8

Ground frost: 14

Ice day (max below 0c): 0

Mean RH: 91% approx

High RH: 100% various dates
Low RH: 61% 11^th

Predominant wind direction: SW
Mean wind speed: 6.8mph
Mean pressure: 1011mbar
Max pressure: 1035mbar 1^st
Min pressure: 968mbar 23^rd

Days with:

Hail: 9 (large hail above 0.5cm =1)
Gale: 0
Thunder: 0

Snow or sleet 4

Snow lying 0900: 0
Fog: 0

Fog at 0900: 0