Epping Weather Station

Monthly Summary: April 2012(Daily Readings)

Temperature °C
   Date or compared to 1981-2010 average
Mean Maximum
12.2
-1.2
Mean Minimum
4.0
-0.7
Monthly Mean
8.1
-0.9
Highest Maximum
17.4
30th
Lowest Maximum
8.2
5th
Highest Minimum
8.5
27th
Lowest Minimum
-3.0
6th
Lowest Grass Min
-5.0
6th
Wind mph
Mean wind speed
5.4
Strongest Gust
36
17th,29th
Dominant Direction
N
Direction at 0900
N
NE
E
SE
S
SW
W
NW
CALM
No of mornings
7
3
0
4
4
5
7
0
0
Precipitation mm
 Date or compared to 1971-2000 average
Monthly Total
138.5
279.8%
Wettest Day
25.6
28th
Rain Days (>0.2mm)
21
Wet Days (>1mm)
18
Days with no rain
5
Sunshine hours
Monthly Total
139.86
% Average
75.7
Days with no sun
2
Sunniest day
11.80
Hours
1st
Number of days with
Air Frost
6
Ground Frost
3
Snow/sleet falling (0000-2400GMT)
0
>50% snow cover at 0900
0
Fog at 0900 (vis <1000m)
0
Thunder heard
7
Hail <5mm diameter
0
Hail > 5mm diameter
8

 
Miscellaneous Data
Mean Relative Humidity at 0900 (%) 86.6
Mean Air Pressure at 0900 (mb) 1003.6
Lowest Pressure (mb) 976.8
Date
 18th
Highest Pressure (mb) 1026.0
Date
 16th
Hours of air frost
15.3
Mean soil temp °C (20cm depth)
7.6
Greatest snow depth (0900)
n/a
Date
n/a
Particular days/events

28th 25.6mm rain is wettest April day since 29/4/91 and second wettest April day on record

7 days with thunder, 8 with large hail.
3 air frosts, 6 ground frosts

 

 

Month as a whole

Wettest April on record
Coldest April since 1991
5.1degC cooler than April 2011
0.6degC cooler than March 2012. An unusual event which last occurred in 1991
April 2012 had 138.5mm of rain, April 2011 a mere 2.1mm of rain
Equal lowest high maximum temperature for April since 1989
Lowest minimum temperature for April since 1996
A thundery April with 7 days of thunder whereas the average is 1 day
325.1mm of rain since 1st October 2011 or 83% of normal

 

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(amended January 2009)

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