April Weather Statistics

[Zenarcher]

Castlebay Isle of Barra April 2011

Highest Temperature 18.2°C

Lowest Temperature 3.8°C

Average Temperature 10.0°C

Total Rainfall 46.8mm

Highest Humidity 98%

Lowest Humidity 44%

Average Humidity 83.9%

Average Wind Speed 14.6mph

Highest Gust 50mph

Highest Pressure 1031.4mb

Lowest Pressure 993.1mb

Lowest Wind Chill -2°C

Highest Dew Point 10.2°C

Lowest Dew Point 0.5°C

Average Dew Point 7.3°C

[Osbourne One-Nil]

An exceptionally warm month, with the mean ending up a full 5 degrees above the 12yr mean. A very wet start, with 73mm falling within the first 6 days, but almost bone-dry since, with just 4.2mm falling since then.

Average daily maximum; 15.6C

Highest daily maximum; 23.8C (21st)

Lowest daily maximum; 8.6C (13th)

Average daily minimum; 4.8C

Highest daily minimum; 9.2C (23rd)

Lowest daily minimum; -1.3C (28th)

Mean monthly temperature; 10.2C (13yr mean 7.2C)

No. of days above 21C; four

No of air frosts; two (seventy-six since first autumn frost)

Total rainfall; 77.6mm

Wettest day; 23.8mm (5th)

No. of wet days (0.2mm or above); nine

Highest wind gust; 45mph (4th)

[TonyH]

April 2011, Lampeter, west Wales

Exceptionally warm and sunny. Very dry

As with the CET zone, west Wales has almost certainly had its warmest April on record, with, incredibly, mean maxima at early June levels! The month was characterized by dry, sunny and warm to very warm conditions and a deficit of cold, wet weather. Seven days exceeded 21c, itself quite an achievement as early as April, while just one day failed to reach the average. Few frosts and just the single air frost. Most of the rainfall total of 29mm fell in the first 5 days, with only 5mm thereafter. I would guess that it was also the sunniest ever April.

1^st- 5^th: Near normal temperatures with rain and showers at times. Quite a spectacular, though brief thunderstorm in the early hours of the 2^nd.

6^th-10^th: Warm to very warm and mostly sunny.

11^th-13^th : A little rain at times, much cooler, only reaching 9c on the 13^th.

14^th- 22^nd : Dry, soon became warm to very warm again. Sunny periods, although a few cloudier days too. Temperatures peaked at around 24c on both 21^st and 22^nd (Good Friday), and were just short of the remarkable values of April 2007. Light showers on the evening of the 22^nd.

23^rd- 30^th : Mostly warm and dry with sunny periods, although much cooler than Good Friday. First air frost on 28^th, this only slight. A very warm but quite windy final day - fittingly for this truly exceptional month.

Stats

Total rainfall: 28.8mm

Wettest day: 7.0mm

Rain days >0.2mm: 11

Wet days >1.0mm: 7

Days of heavy rain>10mm: 0

Mean temperature: 11.4c

Mean Max: 17.4c

Mean Min: 5.4c

High max: 24.4c 21^st

Low Max: 9.4c 13^th

High min: 10.5c 1^st

Low min: -0.7c 28^th

Air frost: 1

Ground frost: 5

Mean RH: 79%

High RH: 97% 1^st

Low RH: 38% 28^th

Predominant wind directions: SSE and North

Mean wind speed: 1.78mph

Mean pressure: 1019mbar

Max pressure: 1032mbar 12^th

Min pressure: 1003mbar 2^nd

Days with:

Hail:1

Sleet or snow: 0

Snow lying 0900: 0

Gale: 0

Thunder: 1

Fog: 4

Fog at 0900: 1

Note to graphs:

Due to over-sheltering in certain conditions, some of the maxima have been adjusted down by 1c, this is not apparent in the graphs.

Data loss 15th-16th.

[Optimus Prime]

An incredibly warm month overall, Mean maximum temperature were almost 6.0c above normal and well above the average for a typical May. Overall mean temperatures around 5.0c above normal. Also dry and sunny too. Only a few light frosts were observed (on car windscreens) throughout this exceptional month

Mean Maxima 19.1c (+5.7c)Mean Min 8.4c (+3.6c)Mean 13.8c (+4.7c)

Highest maximum 26.6c (23rd)Lowest maximum 12.2c (5th)Lowest minimum 2.6c (3rd)Highest minimum 11.9c (2nd)The previous warmest on record, 2007 had a mean of 12.7c

[TonyH]

And from the Bablake school, Coventry:

Bablake April 2011

[The PIT]

Warmest ever April for us coming in at 12c. That smashed the 2007 record by 0.8c.

Very dry with just 12.4 mm of rain.

Full details here My link

[Osbourne One-Nil]

Mean Maxima 19.1c

Bloody hell!

Warmest ever April for us coming in at 12c. That smashed the 2007 record by 0.8c.

Just noticed that's a record April here too, and the first to have a mean in double figures. In 2001, my mean was only 6.1C (compared to 10.2C this year!)

[Terminal Moraine]

An incredibly warm month overall, Mean maximum temperature were almost 6.0c above normal and well above the average for a typical May. Overall mean temperatures around 5.0c above normal. Also dry and sunny too. Only a few light frosts were observed (on car windscreens) throughout this exceptional month

Mean Maxima 19.1c (+5.7c)Mean Min 8.4c (+3.6c)Mean 13.8c (+4.7c)

Highest maximum 26.6c (23rd)Lowest maximum 12.2c (5th)Lowest minimum 2.6c (3rd)Highest minimum 11.9c (2nd)The previous warmest on record, 2007 had a mean of 12.7c

Only 19 months ( 11 Julys and 8 Augusts ) in the last 35 years here have exceeded your mean max' for April.

[Stargazer]

Have just compiled my stats, and it looks like I've just beaten OP's mean maximum for the month. Here goes...

Central Reading in April 2011:

Average maximum: 19.4

Average minimum: 8.4

Average for month: 13.9

Highest maximum: 27.7 (April 23)

Lowest maximum: 13.1 (5)

Highest minimum: 11.8 (2)

Lowest minimum: 4.6 (4)

Air frosts: 0

Ice days: 0

Thunder recorded on one day; no snow recorded.

Rainfall: no data available for this site; Reading University shows less than 3mm for the month, which is exceptionally dry.

An exceptionally warm and dry month, with average temperatures not far off those we would expect in June. Unusually warm and sunny spells between the 6th and 11th and the 17th and 25th, with dry cloudier spells and nearer average temperatures in between. The maximum of 27.7 on the 23rd is the highest temperature recorded in April at this location since I moved here in 2002.

[Optimus Prime]

It's going to take a while to get over such a draw-dropping-ly exceptional month.

Compare this to August 2010 (coolest in my records) that averaged 20.6c for mean maxima (which in itself was only 1.2c below normal) it gives you a good idea of how remarkable April was.

[Rob]

0mm recorded for me last month! Truly exceptional!

Max was 26.7c on 23rd

[Radiating Dendrite]

Some unbelievable records have been set for last month!

If December was one of the most exceptional months we will ever live through then surely April will join it at the top table!

I think one of the most amazing things that is currently occurring and was present during the latter part of April is the low humidity recordings, I got down to 22% this afternoon!!

Average certainly seems to have disappeared for the time being.

[johnholmes]

The highest ever April maximum temperature in the 15 years of this site although nowhere near the highest average maximum or mean temperature.

Also very very dry, making it the second consecutive month with no 'real' rainfall.

long term averages in brackets-all temperatures in degrees C

Mean=12.7(8.3)

Avge Max=16.3(12.6)

Avge Min=9.0(3.9)

Daytime maximum=27.4 on 23rd with daytime lowest max=12.6 on 4th

Lowest overnight minimum=3.0 on 4th and warmest night=12.8 on 6th.

Rainfall= 2.4mm, 1 day with 1.0mm or more and wettest was 3rd with 2.0mm

No frost of either type, no thunder hail or snow and 2 days of fog at 9am clock time.

[Terminal Moraine]

The warmest April on record here by a wide margin. The 23rd was also the warmest April day on record and the 24th had the highest April min' on record.

It was also the driest April on record by a margin of 0.7 mm over 1984. 2 rain days ( 0.2 mm or more ) was the fewest in any month since I began recording in 1963.

Sunshine was well above average but it was not quite as sunny as April 2007.

April 2011 also joined a list of 6 months as the least foggy on record; there was just 1 day with fog recorded.

The others were June 1978, May 1982, March 1995, Feb' 1998, July 2001 and June 2006.

Mean max' temp'......15.1c...( +4.8c ) 1981-2010 average

Mean min' temp'.......6.8c...( +3.1c )

Highest max'.........23.0c...(23rd )

Lowest max'...........8.9c...(4th )

Lowest min'...........2.3c...(4th )

Highest min'.........12.4c...(24th )

Lowest Grass min'....0.0c...(13th )

Total Rainfall........10.9mm..(14% )

Wettest Day............6.7mm...(3rd )

Rain Days (0.2mm or more).....2

Total Sunshine........178.5 hrs...(139% )

Sunniest Day...........12.3 hrs...(20th )

Sunless Days............3

Days with Thunder.......2

Days with Hail..........1

Air Frost...............0

Ground Frost............0

Sleet/Snow falling......0

Snow lying at 0900......0

Mean wind speed at 0900..13.5 mph

Highest Gust..............56 mph...(4th )

[Evening thunder]

A very warm and sunny month April compared to normal. The driest I've recorded since I started October 07 and also the most above average temperature anomaly wise. Sunshine is not available for this site but a nearby site suggests just under 250 hours for the month. The usual sea breezes occurred at times but this didn't have too much impact or stop plenty of warm days. There was a run of 7 days with a max >20C. The month is also notable for not having any air frosts recorded.

Stats according to my Davis VP2 below.

Note most data recorded by the station midnight-midnight except 'highest/lowest overnight min' which is adjusted.

Highest max: 23.8°C (20th)

Lowest max: 10.5°C (13th)

Highest overnight min: 10.8°C (night of 29th to 30th)

Lowest overnight min: 0.2°C (night of 3rd to 4th)

Highest daily mean:14.6°C (30th April)

Lowest daily mean: 7.2°C, (13th April)

Mean max: 17.4°C - about 5C above average!

Mean min: 4.9°C,

Mean: 11.4°C, about 3.1C above average

Wettest day: 3.8mm (13th)

Monthly total: 9.2mm - way below average (about 55mm) including some days where 0.2mm dew or frost melt was recorded

Days of rain over 2.0mm: 2

Days of falling sleet/snow: 0

Days of thunder heard: 3 - 23rd April: rumbles from thunderstorm several miles to the north, 29th April: very distant flashes + rumbles from storms well out in the channel (maybe not worth counting), 30th April: Thunderstorm just to north, followed by 3 more showers with a few rumbles to the north.

Average wind speed: 4.3mph

Max gust: 35mph (2nd)

Graph of temperature, dew point, and rainfall from the 1st April to the 1st May.

[Thundery wintry showers]

Finally got my April 2011 statistics in for Cleadon.

Mean max 15.4C (+4.4)

Mean min 7.1C (+2.9)

Mean temp 11.2C (+3.6)

Highest max 20.7C (23rd)

Lowest max 11.7C (13th)

Highest min 12.0C (6th)

Lowest min 2.6C (28th)

Total precipitation: 4mm

Highest total: 2mm (1st)

Days of >= 1mm precipitation: 3

Days with fog at 9am: 2

No frosts, snow or thunder. 1 day of hail (3rd)

April 2011 was an exceptionally warm, dry, sunny, record-breaking month at Cleadon. The first week was warm and dry but mostly cloudy, but the 6th and 7th were sunny and the 6th reached 20.4C, and the 8th was even warmer with 20.5C and sunny all day to go with it. After a few sunny days, cloud became variable around the 13th, but the 15th-20th inclusive were very sunny again. The last third of the month was dominated by winds off the North Sea, which brought sea fog and maxima of 12C on the 21st and 22nd, but the 23rd and 24th were notably warm as winds temporarily turned westerly. There were some heavy, albeit very brief, showers late on the 23rd (hence just 1mm in the rain gauge that day) but no thunder. Despite the onshore winds from the 25th-30th most days were sunny all day.

Overall the month just managed to beat April 2007 for warmth, being 0.2C warmer, but due to the onshore winds in the last third, it was a much closer-run thing than further inland, e.g. Durham's average maximum for the month is down as a remarkable 16.5C whereas in April 2007, Durham's mean max was only 0.1C above Cleadon's. It was the driest calendar month since I began recording in 1993, and probably the sunniest of the 1993-2007 period, considering the large number of clear sunny days.