Epping Weather Station

Monthly Summary: May 2011(Daily Readings)

Temperature °C
   Date or compared to 1981-2010 average
Mean Maximum
18.6
+1.8
Mean Minimum
8.6
+0.9
Monthly Mean
13.6
+1.3
Highest Maximum
25.4
6th
Lowest Maximum
13.5
26th
Highest Minimum
14.7
8th
Lowest Minimum
1.8
4th
Lowest Grass Min
-0.3
4th
Wind mph
Mean wind speed
5.6
Strongest Gust
34
22nd
Dominant Direction
WSW
 
N
NE
E
SE
S
SW
W
NW
CALM
No of mornings
1
0
6
0
8
9
6
1
0
Precipitation mm
 Date or compared to 1981-2010 av
Monthly Total
19.2
34.7%
Wettest Day
8.8
26th
Rain Days (>0.2mm)
8
Wet Days (>1mm)
6
Sunshine hours
Monthly Total
248.41
% Average
132.8%
Days with no sun
0
Sunniest day
21st
Hours
14.49
Number of days with
Air Frost
0
Ground Frost
1
Snow/sleet falling (0000-2400GMT)
0
>50% snow cover at 0900
0
Fog at 0900 (vis <1000m)
0
Thunder heard
1
Hail <5mm diameter
0
Hail > 5mm diameter
0

 
Miscellaneous Data
Mean Relative Humidity at 0900 (%) 65.7
Mean Air Pressure at 0900 (mb) 1017.4
Lowest Pressure (mb) 1004.1 Date 26th
Highest Pressure (mb) 1027.7 Date 24th
Hours of air frost
0
Mean soil temp °C (20cm depth)
13.2
Greatest snow depth (0900)
--
Date
--
Particular days/events

1st-4th 52.41 hours of sunshine, 89.4% maximum possible
21st 14.49 hours of sunshine
26th Thunder 1415-1515GMT

 

Month as a whole
Sunniest May on record (since 2002)
Driest since 1990 and third driest on record (since 1979)

 

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(amended January 2009)

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