May 2013 Summaries and Statistics

[TonyH]

May 2013 Lampeter, Ceredigion, Wales

 

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 lasted 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: 17
Wet days >1.0mm: 16
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

[johnholmes]

Cantley May 2013 weather summary

A cold month (2nd coldest in the 17 year data period); about average rainfall with one day of 14.8mm (00-24 hours) making it the wettest day here since 20 December last year. Some warm days, principally 5-7th and 31st.

Temperatures in C and averages are over 17 years

Mean T=12.1(13.0)

Avge Max=16.9(17.8C) Highest daytime=23.7 on 7th and 31st; lowest daytime=10.7 on 24th

Avge Min=7.3(8.2) Lowest overnight=3.2 on 16th and warmest overnight=10.8 on 31st

Rainfall=45.5mm with 14.8mm on 15th the wettest; there were 16 days with 0.2mm or more and 13 with 1.0mm or more

No frost, fog, hail or snow recorded

[Styx]

 

 

HOBART ( pop 210,000 ) is Tasmania's capital city. Situated at sealevel at the base of Mount Wellington ( 1270m ).

Climate is temperate with a strong maritime influence.

 

May - Last month of autumn

Another dry and largely settled month with a mean temperature that once again surpassed the 1981-2010 average. Hobart now has not had a below average temperature month since October 2011 ( 19 months ); in that particular year there were 5 such months, not an especially unusal number.  May 2013 started off enthusiastically enough, with a moderate cold SW'ly change bringing a period of overnight showers ( 6mm ) and a snowline to about the 600m level, but the clearance to dry was almost immediate, as the trailing high extended a strong ridge over the island. Temperatures were then on the rise, as the high tracked well to the north east, directing a very mild continental NW'ly airlow over Tasmania for several days. The transition to colder weather came about with an intense low pressure system south of Perth, tracking east- south east, and finally parking itself to the east of Tasmania in a weakened form. This began an eight day stretch of below average daily maxima ( the longest 'cool spell' since June of last year ) with onshore cold SE winds to begin with with low cloud and occasional periods of light showers, then SW-SE winds that were largely dry and very cool, with high pressure ridging circulating around an elongated and fairly stationary high pressure system to the west. Winds eventually turned slightly milder W'ly as high pressure retracted to the Great Australian Bight. The high then crossed to the north of Tasmania, and by months end was centred to the north east, re-introducing very mild temperatures, that were exceptionally high and close to unprecedented for the tail end of autumn.

 

Average maximum:  16.0 ( +0.9 )

Average minimum:  7.1 ( -0.3 )

Rainfall:  23mm ( average 45mm )

 

Extremes in daily temperature for May ( Records since 1882 ):

 

Highest maximum:  22.4 ( Record 25.7 in 1997 )

Lowest maximum:  11.8 ( Record 6.1 in 1921 )

 

Highest minimum:  12.7 ( Record 16.2 in 2005 )

Lowest minimum:  1.6 ( Record -1.6 in 1902 )

[Stargazer]

My statistics for central Reading in May 2013:Average maximum: 16.5Average minimum: 6.8Average for month: 11.6Highest maximum: 22.5 (May 6)Lowest maximum: 10.5 (24)Highest minimum: 13.8 (21)Lowest minimum: 1.4 (16)

 

No snow, air frosts or thunder recorded

Rainfall: approximately 60mm (Reading University site) - somewhat above average

Sunshine: approximately 195 hours (Reading University site) - close to average.

 

A cooler than average month all round, with some notably cold nights and a number of ground frosts.  There was a pleasant warm spell during the first week, although most of the rest of the month was cool.  The middle two weeks of the month were generally cold and dull with several wet days.  The minimum of 1.4 on the 16th was notably low for mid-May.

[sundog]

The summary for Ireland for may 2013 by Met Eireann.

Monthly mean temperatures were all below average, with differences of up to nearly - 1.5°C in parts of the West and Northwest. Warmest conditions (compared to average) were in the Dublin area, with Phoenix Park reporting a mean temperature of 10.7°C, just 0.1°C below its May average. Almost all stations across the country reported that it was the coldest May since 1996 (17 years). ?Monthly mean maximum temperatures were well below average especially in the West and Northwest, with most parts reporting their lowest values in 17 to 34 years. Highest maximum temperatures were all recorded at the end of the month, with Mountdillon and Dublin (Phoenix Park) both reporting the month’s highest temperature of 20.4°C. Monthly minimum temperatures were near or above average in parts of the West, Southeast and East, with some stations in the West and South reporting their lowest figures in 12 to 17 years. The month’s lowest minimum was at Dublin Airport on the 17th, with -0.5°C.

Rainfall was above average in the West, North, Southwest and in parts of the Midlands with Long-Term Average (LTA) values as much as 176% at Malin Head with a monthly accumulation of 102.5 mm. Elsewhere, percentage values were as low as 60% at Carlow (Oak Park) which reported its driest May in five years, with Dublin (Phoenix Park) also reporting its driest May in five years with 69% of its LTA. The wettest days of the month were mainly between the 7th and the 9th, with the month’s wettest day at Belmullet on the 8th with 29.3 mm, its wettest May day since the station opened in 1957 (56 years).

Sunshine data was near or above average at Cork, Dublin and Shannon Airports, with Cork Airport reporting the month’s highest sunshine total and highest LTA with 197.8 hours and 103%, respectively, and its sunniest May since 2007 (6 years). Knock Airport reported the least sunshine with 135.9 hours, 76% of its LTA and its dullest May since 1999 (14 years). Belmullet reported 152.8 sunshine hours, with eight dull days (days with 0.5 hours of sunshine or less), the highest amount of dull days at any station this month, and its dullest May in 14 years.