Epping Weather Station

Monthly Summary: April 2013(Daily Readings)

Temperature °C
   Date or compared to 1981-2010 average
Mean Maximum 12.8 -0.6
Mean Minimum 3.7 -1.0
Monthly Mean 8.2 -0.8
Highest Maximum 22.7 25th
Lowest Maximum 2.9 4th
Highest Minimum 11.5 25th
Lowest Minimum -2.0 6th
Lowest Grass Min -4.0 21st
Wind mph
Mean wind speed
6.8
Strongest Gust
36
18th
Dominant Direction
SW
Direction at 0900
N
NE
E
SE
S
SW
W
NW
CALM
No of mornings 5 6 3 0 7 5 4 0 0
Precipitation mm
 Date or compared to 1981-2010
Monthly Total 29.1 58.8%
Wettest Day 5.6 10th
Rain Days (>0.2mm) 12
Wet Days (>1mm)
7
Days with no rain 16
Sunshine hours
Monthly Total
176.25
% Average
95.4
Days with no sun
1
Sunniest day
13.86
Hours
20th
Number of days with
Air Frost
7
Ground Frost
11
Snow/sleet falling (0000-2400GMT)
3
>50% snow cover at 0900
0
Fog at 0900 (vis <1000m)
0
Thunder heard
1
Hail <5mm diameter
1
Hail > 5mm diameter
2

 
Miscellaneous Data
Mean Relative Humidity at 0900 (%) 77.5
Mean Air Pressure at 0900 (mb) 1014.5
Lowest Pressure (mb) 992.0
Date
 12th
Highest Pressure (mb) 1033.9
Date
 20th
Hours of air frost
47.3
Mean soil temp °C (20cm depth)
7.2
Greatest snow depth (0900)
n/a
Date
n/a
Particular days/events

4th The maximum temperature of 2.9 was the lowest on record (1979).
3rd-5th Light snow flurries and snow grain.
19th Thunderstorm mid-afternoon.
25th Pale brown dust at 0900 GMT observation

 

Month as a whole

Lowest mean minimum temperature for April since 1990.
Highest number of air frosts (7) on record (1979).
Although the mean temperature was similar to 2012 the total rainfall was only 21% of that for April 2012
Easterly winds persisted until the 11th bringing unusually cold conditions. For the remainder of the month south-westerly winds brought a steady rise in temperature.

 

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(amended January 2009)

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