Epping Weather Station

Monthly Summary: May 2012 (Daily Readings)

Temperature °C
   Date or compared to 1981-2010 average
Mean Maximum
16.9
+0.1
Mean Minimum
8.7
+1.0
Monthly Mean
12.8
+0.5
Highest Maximum
26.6
28th
Lowest Maximum
8.0
4th
Highest Minimum
13.3
29th
Lowest Minimum
2.9
16th
Lowest Grass Min
0.8
16th
Wind mph
Mean wind speed
5.0
Strongest Gust
31
11th,12th
Dominant Direction
N
 
N
NE
E
SE
S
SW
W
NW
CALM
No of mornings
10
3
5
1
3
1
7
1
0
Precipitation mm
 Date or compared to 1981-2010 av
Monthly Total
83.7
151.5%
Wettest Day
19.3
30th
Rain Days (>0.2mm)
16
Wet Days (>1mm)
10
Sunshine hours
Monthly Total
166.63
% Average
89.1%
Days with no sun
4
Sunniest day
27th
Hours
15.94
Number of days with
Air Frost
0
Ground Frost
0
Snow/sleet falling (0000-2400GMT)
1
>50% snow cover at 0900
0
Fog at 0900 (vis <1000m)
1
Thunder heard
4
Hail <5mm diameter
0
Hail > 5mm diameter
4

 
Miscellaneous Data
Mean Relative Humidity at 0900 (%) 83.5
Mean Air Pressure at 0900 (mb) 1016.2
Lowest Pressure (mb) 1002.8 Date 18th
Highest Pressure (mb) 1037.8 Date 12th
Hours of air frost
0
Mean soil temp °C (20cm depth)
12.5
Greatest snow depth (0900)
--
Date
--
Particular days/events

4th Maximum temperature only 8.0º
15th Short burst of sleet in heavy shower mid afternoon
24th Thick fog at 0900
25th to 27th unbroken sunshine
30th Violent shower with large hail and thunder 1700-1730. 19.1mm of rain fell in 20 minutes 1700-1720

Thunder on following dates

10th 1550
14th 1930-2000
15th 1420-1500
30th 1500-1730

 

Month as a whole
Generally cool, dull and wet until 22nd. Abrupt change to much warmer and sunnier conditions from the East for the last week of the month although there were thunderstorms by the 30th

Dullest May since 2007
Wettest May since 2007 and 6th wettest on record

 

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The data on this website may be freely used for personal and/or academic purposes only - please acknowledge source in publication
(amended January 2009)

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