Epping Weather Station

Monthly Summary: May 2009(Daily Readings)

Temperature °C
   Date or compared to 1971-2000 average
Mean Maximum
18.1
+2.1
Mean Minimum
8.6
+1.2
Monthly Mean
13.4
+1.7
Highest Maximum
23.4
31st
Lowest Maximum
12.6
4th
Highest Minimum
11.9
29th
Lowest Minimum
4.3
4th
Lowest Grass Min
1.1
4th
Wind mph
Mean wind speed
5.5
Strongest Gust
37
8th
Dominant Direction
SW
 
N
NE
E
SE
S
SW
W
NW
CALM
No of mornings
1
2
7
1
4
7
9
0
0
Precipitation mm
 Date or compared to 1971-2000 average
Monthly Total
28.4
56.9%
Wettest Day
12.5
25th
Rain Days (>0.2mm)
11
Wet Days (>1mm)
6
Sunshine hours
Monthly Total
223.98
% Average
115.5
Days with no sun
1
Sunniest day
16.07
Hours
30th
Number of days with
Air Frost
0
Ground Frost
0
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 (%)
72.0
Mean Air Pressure at 0900 (mb)
1018.1
Lowest Pressure (mb) 1000.8 Date
15th
Highest Pressure (mb) 1032.3 Date
29th
Hours of air frost
0
Mean soil temp °C (20cm depth)
13.5
Greatest snow depth (0900)
--
Date
--
Particular days/events

25th Pressure fall from 1018.9mb at 0740 to 1013.0mb at 1000 accompanied by gusty easterly winds and much foliage fall
26th Thunder heard 0300

 

Month as a whole

Past 13 Mays all warmer than 1971-2000 long term average
Despite the overall warmth there were no extreme temperatures
Lowest absolute maximum temperature since 1999

 

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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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