May 2010 Weather Summary

[johnholmes]

May weather data for Cantley, Doncaster (long term averages in brackets); temps in C

NB:-from1st to 1500BST 20th temps only in whole degrees due pc problems

Mean temp=12.0(11.3)

Avge Max=17.5(16.2)

Avge Min=6.5(6.4)

Highest on 23^rd=29.9; lowest day max 10.0 on 2nd

Warmest night=20^th with 14.0 and coldest=11^th with -1.1

2(<1) air frosts and 4(5) ground frosts

6.8mm of rain with 1.6mm on 29^th the wettest day.

Auto records since April 2005 make this the driest May

10 days with 0.2mm or more and 3 days with 1.0mm or more

No snow, fog or thunder reported.

So in summary a very dry month with afternoon temperatures 1.3C above the long term average so making it an above average month in temperatures.

[Optimus Prime]

Mean Max 17.1c (+0.9c)

Mean Min 6.2 (-1.0c)

Mean temperature 11.6c (-0.1c)

[TonyH]

May 2010 summary and statistics for Lampeter, Ceredigion

Summary

Dry and quite sunny, average temperatures.

A nice dry month with plenty of sunshine. The driest May locally since 2005, it would have been even drier were it not for 12mm rain falling early on June 1st. Much of the first half was on the cool side, while the second half was average to warm.

1st - 17th: An often cool northerly flow with sunny spells. Rather unsettled at times, although just trifling amounts of rainfall. The first thunder of 2010 occurred on the 1st which also happened to be a rare warmish day (16c) for the first half of the month. Occasional frosts at night, the lowest was -1.8c on the 4th.

18th - 19th : Warmer at last still a little rain around.

20th - 25th : Warm to very warm and very sunny. A sudden appearance of Summer with the magic 80f reached (22nd)! Coolish nights still though.

26th - 31st : Temperatures returned to around the average or even rather cool. Mostly dry with sunny spells although fairly wet on the 29th. Wet after midnight on the 31st, but of course it has to count towards May’s rain and not June’s!

Statistics

Total rainfall: 43.4mm

Wettest day: 11.8mm 31st

Rain days >0.2mm: 18

Wet days >1.0mm: 11

Days of heavy rain >10mm: 1

Mean temperature: 10.5c

Mean Max: 16.4c

Mean Min: 4.6c

High max: 26.9c 22nd

Low Max: 11.1c 8th

High min: 11.9c 20th

Low min: -1.8c 4th

Air frost: 3

Ground frost: 9

Mean RH: 78%

High RH: 96% various dates

Low RH: 43% 23rd

Predominant wind directions: NNW

Mean wind speed: 1.6mph

Mean pressure: 1018mbar

Max pressure: 1033mbar 20th

Min pressure: 1003mbar 27th

Days with:

Hail: 0

Sleet or snow: 0

Gale: 0

Thunder: 1

Fog: 3

Fog at 0900: 0

Notes to graphs:

Add 20mbar to graphed (absolute) pressure

Maxima on occasions read slightly high by 1-2c under southerly sunny conditions.

These compensated for in above stats and summary.

[Stargazer]

May 2010 here in central Reading...

Mean maximum 17.6

Mean minimum 7.5

Mean temperature for the month 12.5

Highest maximum 28.1 (May 24)

Lowest maximum 9.1 (2)

Highest minimum 13.1 (21)

Lowest minimum 0.6 (12)

Air frosts 0

Days thunder heard 0

A drier than average month with a cold first half and warm second half giving near average overall temperatures. A cold and wet start followed by a long dry spell with below average temperatures up to the 16th. Temperatures then recovered, with a notable warm spell under cloudless skies from the 22nd to the 24th and a warmer than average final week. Interestingly the coldest daytime and night time temperatures were both lower than for April. And nearly all the rain we had fell at weekends B)

[RichardR]

Buxton, Derbyshire, England

May2010 Climatic Records

Latitude 53*N Longitude 1.5*W Elevation 338m/1110ft AMSL

Valid 1st- 31st May, 2010

Mean Maximum: 13.9°C / 57°F

Mean Minimum: 5.6°C / 42.1°F

Mean Temperature: 9.7°C / 49.5°F

Highest Temperature: 26.6°C / 79.9°F (23rd)

Lowest Temperature: -0.6°C / 30.9°F (13th)

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

Lowest Maximum: 7.5°C / 45.5°F (2nd)

Highest Minimum: 12.4°C / 54.3°F (24th)

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

Precipitation: 23mm/0.91"

Days with rain >1mm: 3

Days with rain/drizzle: 16

Most in one day: 16mm/0.63" (29th)

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

Mean Pressure: 1017.9mb

Max Pressure: 1033mb (20th)

Min Pressure: 1008mb (29th)

Average Maximum Wind Gust: 27.2mph

Maximum Wind Gust: 49mph (30th)

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

Sunshine hours: 166.26

Most in one day: 15.18 (24th)

Average per day: 5.36

Sunless days: 4

% of Max Poss: 35%

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

Days with Sleet/Snow: 1

Days with Fog: 0

Nights below freezing: 1

Days with Hail/Ice Pellets: 0

Days thunder heard: 0

[Ben_Cambs]

Cambridge Weather Summary

May 2010

Based on 31 days' worth of half-hourly data recorded with

rooftop sensors at the Computer Laboratory, Cambridge, U.K.

Temperature (degrees C)

Average: 11.2

Minimum: -0.8 (12 May 05:30)

Maximum: 27.8 (23 May 15:00)

Relative Humidity (%)

Average: 68.8

Minimum: 25 (23 May 15:30)

Maximum: 100 (13 May 05:00)

Dew Point (degrees C)

Average: 5.2

Minimum: -5.1 (13 May 11:30)

Maximum: 15.0 (24 May 08:00)

Atmospheric Pressure (mbar)

Average: 1016.2

Minimum: 1003 (29 May 18:00)

Maximum: 1034 (20 May 08:30)

Half-hourly Instantaneous Wind Speed (knots)

Average: 4.0

Minimum: 0.0 (04 May 21:00)

Maximum: 26.0 (03 May 15:00)

Half-hourly Maximum Wind Speed (knots)

Average: 10.6

Minimum: 0 (04 May 21:30)

Maximum: 38 (30 May 13:30)

Prevalent Wind Direction

NW (26.7% of readings)

Total Sunshine Hours

176.6

[magicpatch]

May 2010 from my Weather Station:

Average temperature = 12.7°C

Average humidity = 60%

Average dewpoint = 4.4°C

Maximum temperature = 28.2°C on day 24 at time 13:52

Minimum temperature = 2.8°C on day 12 at time 03:20

Maximum humidity = 96% on day 08 at time 16:41

Minimum humidity = 23% on day 24 at time 16:22

Maximum dewpoint = 13.1°C on day 29 at time 15:28

Minimum dewpoint = -4.8°C on day 03 at time 19:42

Maximum heat index = 27.2°C on day 24 at time 13:51

Avg daily max temp :18.1°C

Avg daily min temp :8.2°C

[Osbourne One-Nil]

A statisitcally cold month overall; the lowest mean temperature for May since I started recording in 1999, but with some very warm temperatures in the third week, and some very cold nights in the first fortnight. Also, very dry for the month, beating the previous driest May in 2001 by 0.3mm.

The results for Great Asby, The North, are as follows:-

Average daily maximum; 14.6º

Highest daily maximum; 25.9º (22nd and 23rd)

Lowest daily maximum; 8.5º (2nd)

Average daily minimum; 3.8º

Highest daily minimum; 12.4º (21st)

Lowest daily minimum; -3.3º (12th)

Monthly mean temperature; 9.2º (12yr mean, 10.0º)

Number of air frosts; seven

Total rainfall; 19.2mm

Number of wet days (0.2mm or above); nine

Wettest day; 4.0mm (29th)

Highest wind gust; 30mph (30th)

[Terminal Moraine]

May was looking to be the coldest since 1996 at one point but the short hot spell around the 23rd brought the mean up to equal May 2005. The max' of 25.3c on the 23rd was the highest in May since 1953 and the min' of 15.1c on the same date was the highest for the month since at least 1963.

It was the driest May since 1991 and the second driest on record ( 1963 ). The first 5 months of 2010 have been the driest for any year since 1976.

MAY STATISTICS

Mean max' temp'......13.5c ( +0.2c )

Mean min' temp'.......6.0c ( 0.0c )

Mean temp'............9.7c ( +0.1c )

Highest max'.........15.3c ( 23rd )

Lowest max'...........6.7c ( 2nd )

Highst min'..........15.1c ( 23rd )

Lowest min'...........0.8c ( 4th, 13th )

Rainfall.............16.3mm ( 26% )

Wettest day...........6.1mm ( 29th )

Rainf days ( 0.2 mm+ )...10

Sunshine.............164.98 hrs ( 94% )

Sunniest day..........14.47 hrs ( 24th )

Days with snow/sleet......2

Days with thunder.........0

Air frost.................0

Ground frost..............6

Mean wind speed at 0800 g.m.t... 13.0 mph

Highest gust......................46 mph ( 8th, 30th )