Epping Weather Station

Monthly Summary: August 2011(Daily Readings)

Temperature °C
   Date or compared to 1981-2010 average
Mean Maximum 20.8° -1.4degC
Mean Minimum 12.7° -0.3degC
Monthly Mean 16.7° -0.9degC
Highest Maximum 29.5° 3rd
Lowest Maximum 15.1° 23rd
Highest Minimum 16.7° 2nd
Lowest Minimum 8.7° 19th
Lowest Grass Min 7.4° 19th
Wind mph
Mean wind speed
3.7
Strongest Gust
32
Date
8th
Dominant Direction
SW
Direction at 0900
N
NE
E
SE
S
SW
W
NW
CALM
No of mornings
2
4
1
1
7
3
13
0
0
Precipitation mm
 Date or compared to 1981-2010 average
Monthly Total
87.5
155.1%
Wettest Day
20.1
18th
Rain Days (>0.2mm)
18
Wet Days (>1mm)
15
Sunshine hours
Monthly Total
153.11
% Average
83.6
Days with no sun
2
Sunniest day
12.19
Date
19th
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
2
Hail <5mm diameter
0
Hail > 5mm diameter
0

 
Miscellaneous Data
Mean Relative Humidity at 0900
80.5%
Mean Air Pressure at 0900
1012.7mb
Lowest Pressure 1000.0mb
Date
8th
Highest Pressure 1025.5mb
Date
9th,10th
Hours of air frost
0
Mean soil temp °C (20cm depth)
16.0
Greatest snow depth (0900)
n/a
Date
-
Particular days/events

First 3 days very warm with Tmax of 27.9°,27.9º amd 29.5º
7th Lightning observed to E in evening
18th Thunder 1440 and 1750GMT
23rd Tmax only 15.1º, the lowest for August since 19th August 2005
26th Thunder 1713-1730GMT

 

Month as a whole

Cool, wet and rather cloudy. A trend evident in recent Augusts with 2009 being the only exception

 

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(amended January 2009)

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