2012 Weather

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2012 Summary

and even more

Rainfall totalled 1160.4mm, the highest recorded here in 57 years, beating 1033.7mm in 1960.
There were 217 raindays (2nd on record), and 159 wetdays (2nd on record). 
 
The number of very wet (>=5mm) days has been a new record during the summer season, and 5th for the spring.   After a dry start, we have had the 9th wettest spring, 2nd wettest summer and 6th wettest autumn in 57 years.  The station is on fairly high ground, so has not been flooded as such, but being on thick clay has meant that the ground has been saturated for the latter half of the year.

Temperatures have been statistically 0.1C below normal, although mean min is +0.2C and mean max -0.4C compared with 30 year data.  The late frost of 15/4/12 and the early frost of 14/10/12 gave 182 frost-free days for growers, but the quantity and intensity of rain has caused problems this year.

By Month

January
A pleasant January, fairly mild (12th highest mean in 57 years) . The lowest min temp was -2.9C (12th highest low min for January).  21 out of 31 days enjoyed a max temp exceeding the expected 6.8C here.  

February
The latter part of the month was mild, reaching 17.2C on 23rd, a new record for February, followed by a very mild night only falling to 9.1C, the 7th mildest night on record.

March
Highest mean temp 8.8C on record, 2.3 deg above normal, and 2nd highest himax and lomin.  This was 1 of only 2 years having no March air frosts.  

April
Cool and exceptionally wet with only 7 dry days. The 2nd highest rainfall 143.7mm, and the highest number of wet days on record.  

May
Slightly above normal temperature, but cool until 21st, then very warm until 30th.
HiMax 27.0C was 5th= highest in 57 years. Only 1 groundfrost recorded, 9th= fewest. 
Rainfall 90.7% of normal, making cumulative Jan-May 304mm, about average, although very unevenly distributed, dry Feb/Mar, very wet Apr. 

June

The wettest June on record here with 185.6mm (305%) rainfall, having 24.5mm on 7th, 18.5mm on 14th followed by 24.3mm on 15th. 
On 28th, remarkably gloomy skies delivered 21mm of sudden torrential rain between 1000 and 1030, accompanied by thunder and lightning and causing flash flooding on some roads. 
To confirm how dark it was at 1030, solar radiation was logged at just 7W/m2, lower than it was at 0530 that morning and 2130 that evening.

July
Mostly was wet and cool, except 21st-29th which were brighter, warmer and dry, the overall mean temperature being 1 degree below normal. Another very wet month with 189% normal rainfall, the 7th wettest.   29.7mm steady rain fell all day on 6th, making it the 10th wettest July day on record.

August
A mixed month, dullest 15-16 and 27-30, brightest 1-3 and 9-11. Statistically slightly above average mean temperature, but mean min temperatures higher than usual and mean max lower than usual. 
Monthly rainfall 139% of normal, with 8 month cumulative rainfall Jan-Aug now 693mm, the 2nd highest.

September
A slightly cooler than usual and wet month. However it was very warm and pleasant until 9th, then fairly warm until 19th.  The total rainfall from 23rd to 25th was 79.4mm, and the month's total 101.9mm. 
Cumulative rainfall Jan-Sep now 795.1mm, again the highest on record.

October
A cool, damp month, especially 25-29th, with 10th lowest mean temp and 2nd lowest HiMax temp. 
Rainfall just below normal for the month, but aggregated rainfall from Jan-Oct totals 872mm, the highest on record, and already ranking 10th compared with full annual rainfall totals in previous years. Very low pressure 976.4mb recorded late on 31st, the 12th lowest hourly pressure logged here in last 6 years.

November
A cool November, milder 13th and 20-22nd with few sunny days. 
Between 20-26th 110.4mm rain fell, wettest day 24th with 41.5mm, the 17th wettest on record.
Cumulative rainfall Jan-Nov 1012.8mm, which already ranks 2nd in annual rainfall totals here, exceeded only by 1033.7mm in 1960.

December
Cool up to 13th (especially 11th-13th), but milder from 14th.
Rainfall 147.6mm was highest Dec total on record, giving the highest annual total of 1160.4mm. 
Also 13 very wet (>5mm) days, the highest number on record for December. 
Rain recorded every day from 19th-31st. Ground remains saturated.
No fog days were recorded, this has only happened 10 years out of 57.

-----------------------------------------------------------------------------------------------

Annual figures

TEMPERATURE
13.5 mean max (C) , -0.4 diff from av (C)
6.2 mean min (C) , +0.2 diff from av (C)
9.8 mean (C), -0.1 diff from av (C)
28.1 high max (C) on 24/7 
0.1 low max (C) on 8/2 
16.3 high min (C) on 15/8 
-7.3 low min (C) on 4/2 

RAINFALL
1160.4 rain total (mm), 151.8 % of av 
217 raindays (with 0.2mm or more)
159 wetdays (with 1mm or more)
42.4 most in a day (mm) on 23/9

SNOWFALL
3 days with snow falling 
4 days with 50% snow cover 

PRESSURE
1013.7 mean pressure (mb) , -0.8 pressure anomaly (mb)
1044.8 max pressure at any time of day, on 8/2 
971.5 min pressure at any time of day, on 14/12 

FROSTS
The late frost of 15/4/12 and the early frost of 14/10/12 gave 182 frost-free days 

THUNDER 
6 days with thunder heard 

HUMIDITY
88.4% at 0900

CLOUD COVER
59.9% at 0900

 

Monthly Details:

January 2012 February 2012 March 2012

Overall a pleasant January, fairly mild (12th highest mean in 57 years) with 8 airfrosts from 14th-18th and 29th-31st. The lowest min temp was -2.9C on 16th (12th highest low min for January). 21 out of 31 days enjoyed a max temp exceeding the expected 6.8C here.  
Over 3 hours sunshine on 10th, 13th-17th, 27th-28th and 30th, with max solar radiation 324W/m2 recorded on 30th and 318W/m2 on 27th. 17 sunny days and 14 days without bright sunshine. 

8.1 mean max (C) 
+1.3 diff from av (C)
2.7 mean min (C) 
+1.4 diff from av (C)
5.4 mean (C)
+1.3 diff from av (C)
11.8 high max (C) on 11th 
1.3 low max (C) on 31st 
8.9 high min (C) on 1st 
-2.9 low min (C) on 16th 

60.9 rain total (mm)
92.1 % of av 
20 raindays (days with >=0.2mm)
13 wetdays (days with >=1.0mm)
8.4 most in a day (mm) on 25th

8 days with air frost 
11 days with ground frost 

43 total sunshine (hours) 
4.5 most in a day (hours) on 30th 
14 sunless days 

54 cloud cover percent
89 mean RH

February was cold initially, with 8cm snowfall on 4th which took 2 days to thaw. The coldest night was -7.3C on 4th, the 11th coldest in 57 years.
The latter part of the month was mild, reaching 17.2C on 23rd, a new record for February, followed by a very mild night only falling to 9.1C, the 7th mildest night on record.
Nine days exceeded 10C, from 21st onwards.  Rainfall only 26.8mm, just 57.3% of normal, the 14th lowest on record for this month.
Overall the cold start balanced out the very mild end for the month, so the temperature anomaly appears normal. 

7.1 mean max (C) 
-0.3 diff from av (C)
0.9 mean min (C) 
-0.1 diff from av (C)
4.0 mean (C)
-0.2 diff from av (C)
17.2 high max (C) on 23rd 
0.1 low max (C) on 8th 
9.1 high min (C) on 24th 
-7.3 low min (C) on 4th 

26.8 rain total (mm)
57.3 % of av 
8 raindays (days with >=0.2mm)
5 wetdays (days with >=1.0mm)
14.2 most in a day (mm) on 4th

13 days with air frost 

3 days with snow falling, on 4th,9th,19th and  4 days with 50% snow cover at 0900, on 5th,6th,9th,19th 

80 total sunshine (hours)
7.0 most in a day (hours) on 25th 
6 sunless days 

68.5 cloud cover percent
90.6 mean RH 

Cloud and rain 3rd-7th and 16th-18th but good sunshine 19th-30th. 
Highest March mean temp 8.8C on record here, 2.3 deg above normal, in 57 years, and 2nd highest himax and lomin.
There were 2nd fewest ground frosts, and was 1 of only 2 years having no air frosts. 
Rainfall just 55% of normal in the month, the 7th lowest on record, with 4th fewest wet days. 
Rainfall over the previous 12 months Apr2011 - Mar2012 totals just 521.4mm, which would have been the lowest on record had it been a calendar year.


13.1 mean max (C) 
+2.8 diff from av (C)
4.5 mean min (C) 
+1.8 diff from av (C)
8.8 mean (C)
+2.3 diff from av (C)
21.0 high max (C) on 28th 
5.5 low max (C) on 4th 
7.7 high min (C) on 11th 
0.0 low min (C) on 19th 

20.4 rain total (mm)
54.6 % of av 
8 raindays (days with >= 0.2mm) 
4 wetdays (days with >= 1.0mm)
9.0 most in a day (mm) on 3rd

0 days with air frost 
3 days with ground frost 
4 days with fog 
42.3 cloud cover percent
88.1 mean RH

1027.0 mean pressure (mb) 
+12.9 diff from av  (mb)
1037.6 max pressure on 10th,11th
1008.8 min pressure on 17th

April 2012 May 2012 June 2012

and more

A cool and exceptionally wet April with only 7 dry days. The 2nd highest rainfall 
143.7mm,
beaten only by 150.6mm in 2000, and the highest number of wet days on record. 

Mean temperature 13th lowest, Mean Max temperature was 2.0 deg below normal,  Mean Min only a little below normal. Just 4 slight air frosts on 1, 6, 13 and 15. 
Mean Pressure 2nd lowest on record. 

11.4 mean max (C) 
-2.0 diff from av (C)
3.5 mean min (C) 
-0.5 diff from av (C)
7.4 mean (C)
-1.3 diff from av (C)
16.9 high max (C) on 30th 
3.6 low max (C) on 4th 
7.3 high min (C) on 9 th 
-1.7 low min (C) on 6th 

143.7 rain total (mm)
229.9 % of av 
23 raindays (with >=0.2mm)
22 wetdays (with >=1.0mm)
22.8 most in a day (mm) on 25th

4 days with air frost on 1st, 6th, 13th and 15th
5 days with ground frost briefly on 4th
2 days with smallhail <5mm diameter, on 10th and 20th within heavy showers
 

then

Overall slightly above normal temperature, but cool until 21st, then very warm until 30th. HiMax 27.0C was 5th= highest (in 57 years). 
Rainfall only 90.7% of normal, making cumulative Jan-May 304mm, about average, although very unevenly distributed, dry Feb/Mar, very wet Apr. 
Only 1 groundfrost recorded, 9th= lowest number. 
The afternoon of 15th was gloomy with threatening skies, and thunder was heard occasionally between 1200 and 1600, and there were short sudden intense showers accompanied by hail during that afternoon. 
A most pleasant end to the month, unseasonally warm dry and sunny.

17.1 mean max (C) 
+0.2 diff from av (C)
7.7 mean min (C) 
+0.8 diff from av (C)
12.4 mean (C)
+0.5 diff from av (C)
27.0 high max (C) on 24,27 
7.7 low max (C) on 3 
14.1 high min (C) on 25 
1.7 low min (C) on 5 

52.6 rain total (mm)
90.7 % of av 
12 raindays (with 0.2mm or more)
8 wetdays (with 1.0mm or more)
11.4 most in a day (mm) on 9 

0 days with air frost 
1 day with ground frost 

1 day when thunder heard, 15th between 1200-1600
1 day smallhail, 15th

and more

The wettest June on record here with 185.6mm (305%) rainfall, having 24.5mm on 7th, 18.5mm on 14th followed by 24.3mm on 15th. 
On 28th, remarkably gloomy skies delivered 21mm of sudden torrential rain between 1000 and 1030, accompanied by thunder and lightning and causing flash flooding on some roads. 
To confirm how dark it was at 1030, solar radiation was logged at just 
7W/m2, lower than it was at 0530 that morning and 2130 that evening.
Temperatures were slightly below normal, generally rising during the month, the himax being 2.2C below normal, the 11th lowest in 57 years. 
Mean pressure was the lowest on record for June at 1008.8mb, as was the min pressure. One effect of the very wet month was that local allotment growers used only 9% of 
the normal amount of monthly mains water for their crops. 
A very disappointing month.

17.6 mean max (C) 
-2.2 diff from av (C)
10.2 mean min (C) 
+0.3 diff from av (C)
13.9 mean (C)
-0.9 diff from av (C)
24.1 high max (C) on 28th 
9.9 low max (C) on 3rd 
16.1 high min (C) on 28th 
5.2 low min (C) on 10th 

185.6 rain total (mm)
305.3 % of av 
22 raindays (with >=0.2mm)
20 wetdays (with >=1.0mm)
24.5 most in a day (mm) on 7th

3 days with thunder 
6th at 1600 
15th at 1700 
28th from 0940-1145, mostly around 1030

1008.8 mean pressure (mb)
-7.2  mb lower than normal
984.2 min pressure on 8th

July 2012 August 2012 September 2012
+ a little

Most of July was wet and cool, except 21st-29th which were much brighter, warmer and dry, the overall mean temperature being 1 degree below normal. 
Another very wet month with 189% normal rainfall, the 7th wettest July in 57 years. 
There was 29.7mm daily rainfall on 6th when rain fell steadily all day, making it 
the 10th wettest July day on record here. 
The monthly mean pressure was the 9th lowest, so that 5 of the last 6 consecutive 
years have seen mean pressures amongst the 9 lowest for July in 57 years (2010 did not). 
So plenty of gloom to report, but thankfully a little bit of summer too.

20.3 mean max (C) 
-1.6 diff from av (C)
11.5 mean min (C) 
-0.4 diff from av (C)
15.9 mean (C)
-1.0 diff from av (C)
28.1 high max (C) on 24th 
15.6 low max (C) on 10th 
15.2 high min (C) on 25th 
7.5 low min (C) on 21st 

110.8 rain total (mm)
189.1 % of av 
20 raindays (with >=0.2mm)
14 wetdays (with >=1.0mm)
29.7 most in a day (mm) on 6th

67.7 cloud cover percent
85.8 mean RH

1012.1 mean pressure (mb)
-3.3 mb lower than normal
1025.4 max pressure on 22nd
997.9 min pressure on 13th

A mixed month, dullest 15-16 and 27-30, brightest 1-3 and 9-11. Statistically slightly above average mean temperature, but mean min temperatures higher than usual and mean max lower than usual. 
Monthly rainfall 139% of normal, with 8 month cumulative rainfall Jan-Aug now 693mm, the 2nd highest in 57 years, beaten only by 2007.

20.8 mean max (C) 
-0.6 diff from av (C)
12.8 mean min (C) 
+1.1 diff from av (C)
16.8 mean (C)
+0.3 diff from av (C)
24.5 high max (C) on 10th 
15.3 low max (C) on 29th 
16.3 high min (C) on 15th 
5.6 low min (C) on 31st 

92.4 rain total (mm)
139.4 % of av 
21 raindays (days with >=0.2mm)
16 wetdays (days with >=1.0mm)
18.2 most in a day (mm) on 15th

2 days thunder heard on 4th at 1715 and 25th from 1305-1700 

Summer Season (June July and August):
3 month cumulative rainfall 389mm is 2nd highest in 57 years, just 4mm less than in 2007.
There have been 63 raindays, 50 wetdays and 26 verywetdays (all of these are the highest recorded here). 
Mean temperature 15.5C, which is normal, although temperatures have had a lower range than usual over the season. Highest Max temperature 28.1C and mean max only 19.6C, both lower than usual. Lowest Min temperature 5.2C and mean min 11.5C, both higher than usual. 

+ a little

Overall a slightly cooler than usual and wet month. However it was very warm and pleasant until 9th, then fairly warm until 19th. Coldest night 22nd was only 2.3C but no ground frost was apparent.
Very heavy rainfall on 23rd produced 42.4mm (the 4th highest for any September day, and 14th highest daily rainfall overall in 57 years here). The total rainfall from 23rd to 25th was 79.4mm, and the month's total 101.9mm. 
Cumulative rainfall Jan-Sep now totals 795.1mm, again the highest on record, just ahead of 793.6mm for the same period in 2007.

17.5 mean max (C) 
-0.8 diff from av (C)
8.6 mean min (C) 
-1.0 diff from av (C)
13.0 mean (C)
-0.9 diff from av (C)
24.5 high max (C) on 9th 
11.2 low max (C) on 23rd 
14.2 high min (C) on 10th 
2.3 low min (C) on 22nd 

101.9 rain total (mm)
160.5 % of av 
13 raindays (days with >=0.2mm)
11 wetdays (days with >=1.0mm)
42.4 most in a day (mm) on 23rd


50.0 cloud cover percent
87.5 mean RH 

October 2012 November 2012 December 2012

A cool, damp month, especially 25-29th, with 10th lowest mean temp and 2nd lowest HiMax temp in 57 years. Rainfall just below normal for the month, but aggregated rainfall from Jan-Oct totals 872mm, the highest on record here, and already ranking 10th compared with full annual rainfall totals in previous years. Very low pressure 976.4mb recorded late on 31st, the 12th lowest hourly pressure logged here in last 6 years.

12.3 mean max (C) 
-1.6 diff from av (C)
6.1 mean min (C) 
-0.8 diff from av (C)
9.2 mean (C)
-1.2 diff from av (C)
15.2 high max (C) on 1,18 
7.3 low max (C) on 27 
11.1 high min (C) on 24 
-0.9 low min (C) on 27 

77.3 rain total (mm)
94.4 % of av 
23 raindays (days with >=0.2mm)
16 wetdays (days with >=1.0mm)
14.6 most in a day (mm) on 11 

3 days with air frost 
1 day with ground frost 

54.8% cloud cover percent
93.2% mean RH 
1009.0 mean pressure (mb) 
-3.6 pressure anomaly for month (mb)
1025.3 max pressure on 23
976.4 min pressure on 31

A cool November, milder 13th and 20-22nd with few sunny days. 
Fog 15th and 24th. Airfrosts 18th, 29-30th.  Between 20-26th 110.4mm rain fell, wettest day 24th with 41.5mm, the 
17th wettest on record.
Cumulative rainfall Jan-Nov 1012.8mm, which already ranks 2nd in annual rainfall totals here, exceeded only by 1033.7mm in 1960.

8.9 mean max (C) 
-0.7 diff from av (C)
3.4 mean min (C) 
-0.5 diff from av (C)
6.2 mean (C)
-0.7 diff from av (C)
13.3 high max (C) on 20th 
4.1 low max (C) on 30th 
9.6 high min (C) on 14th 
-2.2 low min (C) on 30th 


140.4 rain total (mm)
191.5 % of av 
18 raindays (with >=0.2mm)
12 wetdays (with >=1.0mm)
41.5 most in a day (mm) on 24th

27.0 rainfall (mm) on 20th 

3 days air frost 
7 days ground frost
2 days fog 

63.8 cloud cover percent
93.5 mean RH 

1007.8 mean pressure (mb)
-4.7 pressure anomaly for month (mb)
1025.8 max pressure on 14th
974.0 min pressure on 1st

Season Summary (Sep,Oct,Nov):
Wet and cool.
6th wettest autumn 319.6mm (normal
209.4mm).
13th coolest mean temp 9.5C (normal 10.1C)
10th highest raindays 54 (normal 46)

 

Temperatures overall just 0.2C above normal, although cooler up to 13th (especially 11th-13th), then milder from 14th.
Rainfall 147.6mm was highest Dec total on record (in 57 years), giving the highest annual total of 1160.4mm. Also 13 very wet (>5mm) days, the highest number on record for December. Rain recorded every day from 19th-31st.
Ground remains saturated.
No fog days were recorded, this has only happened 10 years out of 57. 

7.1 mean max (C) 
+0.2 diff from av (C)
1.9 mean min (C) 
+0.3 diff from av (C)
4.5 mean (C)
+0.2 diff from av (C)
11.9 high max (C) on 22 
0.4 low max (C) on 12 
8.0 high min (C) on 29 
-4.3 low min (C) on 12 

147.6 rain total (mm)
204.7 % of av 
22 raindays (days with >=0.2mm)
19 wetdays (days with >=1.0mm)
22.5 most in a day (mm) on 14

10 days with air frost 
3 days with ground frost 

56.9 cloud cover percent
94.1 mean RH 

1005.9 mean pressure (mb) 
-8.0 pressure anomaly for month (mb)
1031.1 max pressure on 11
971.5 min pressure on 14

 
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