Epping Weather Station

Monthly Summary: December 2010 (Daily Readings)

Temperature °C
   Date or compared to 1971-2000 average
Mean Maximum
2.4
-4.7
Mean Minimum
-2.0
-4.7
Monthly Mean
0.2
-4.7
Highest Maximum
8.0
11th
Lowest Maximum
-1.4
17th
Highest Minimum
4.3
30th
Lowest Minimum
-7.1
20th
Lowest Grass Min
-12.2
20th
Wind mph
Mean wind speed
4.7
Strongest Gust
27
Date
16th
Dominant Direction
N
Direction at 0900
N
NE
E
SE
S
SW
W
NW
CALM
No of mornings
9
4
5
2
2
0
8
1
0
Precipitation mm
 Date or compared to 1971-2000 average
Monthly Total
27.8
48.3%
Wettest Day (09-09)
9.0
18th
Rain Days (>0.2mm)
11
Wet Days (>1mm)
9
Sunshine hours
Monthly Total
25.09
% Average
55.8
Days with no sun
18
Sunniest days
5.47
Date
9th
Number of days with
Air Frost
24
Ground Frost
25
Snow/sleet falling (0000-2400GMT)
10
>50% snow cover at 0900
16
Fog at 0900 (vis <1000m)
9
Thunder heard
0
Hail <5mm diameter
0
Hail > 5mm diameter
0

 
Miscellaneous Data
Mean Relative Humidity at 0900 (%) 91.3
Mean Air Pressure at 0900 (mb) 1013.9mb
Lowest Pressure 988.8mb
Date
 18th
Highest Pressure 1036.5mb
Date
 14th,15th
Hours of air frost
375.3
Mean soil temp °C (20cm depth)
1.4
Greatest snow depth (0900)
13cm
Date
19th
Particular days/events
Snow fell on 1st, 2nd, 4th, 8th, 16th,17th,18th, 20th, 21st, 22nd (10 days)
Full snow cover at 0900 on 1st to 4th and 17th to 28th (16 days)
Ice Days (Tmax <0.0º) on 1st, 2nd, 6th, 7th,17th,18th,19th, 25th (8 days)
Fog on 9 mornings; 6th, 8th,13th,15th, 22nd, 25th, 28th, 29th, 30th

 

Month as a whole
Coldest December since records began here in 1978
Dullest December (and dullest any month) since sunshine recording began in 2001
Most airfrosts (24) for December
Lowest Tmin (-7.1º) since 1981
Most Ice Days (8) since records began
Most days of snow cover (16) since December 1981
Most hours of air frost (375.3) since such recording began in 2000
Lowest Tmax (8.0º) since records began

 

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(amended January 2009)

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