Epping Weather Station

Monthly Summary: January 2004 (Daily Readings)

Temperature °C
  Date or compared to 1971-2000 average
Mean Maximum
7.8
+1.5
Mean Minimum
2.6
+1.0
Monthly Mean
5.2
+1.2
Highest Maximum
11.5
31st
Lowest Maximum
3.6
27th
Highest Minimum
7.4
21st
Lowest Minimum
-3.9
29th
Lowest Grass Min
-5.0
29th
Wind mph
Mean wind speed
6.0
Strongest Gust
50
31st
Dominant Direction
W
Direction at 0900
N
NE
E
SE
S
SW
W
NW
CALM
No of mornings
4
0
2
0
2
4
15
4
0
Precipitation mm
Date or compared to 1971-2000 average
Monthly Total
78.4
126%
Wettest Day
7.3
30th
Rain Days (>0.2mm)
21
Wet Days (>1mm)
20
Sunshine hours
Monthly Total
55.10
% Average
111
Days with no sun
12
Sunniest day
29th
Hours
8.52
Number of days with
Air Frost
8
Ground Frost
9
Snow/sleet falling (0000-2400GMT)
4
>50% snow cover at 0900
3
 
Fog at 0900 (vis <1000m)
0
Thunder heard
0
Hail <5mm diameter
1
Hail > 5mm diameter
0

 

Miscellaneous Data
Mean Relative Humidity at 0900 (%)
91
Mean Air Pressure at 0900 (mb)
1007.0
Lowest Pressure
982.3
Date
13th
Highest Pressure
1027.6
Date
18th
Hours of air frost
53
Mean soil temp °C (20cm depth)
5.3
Greatest snow depth (0900)
6cm
Date
29th
Particular days/events
The 28th saw two cold fronts bringing snowfall. The first was in the early morning and gave a covering 3cm in depth. The second was in the late afternoon and saw temperatures fall from 3.2°C to 0.7°C in less than 15 minutes. The front was accompanied by winds gusting to 40mph, heavy snow and visibility less than 100m. A covering of snow 6 cm in depth resulted from this front. The following day (29th) saw unbroken sunshine, superb visibility and persistent snow cover. Temperatures rose steadily over the following two days reaching the monthly maximum of 11.5°C in the late afternoon of the 31st, accompanied by winds gusting to 50mph.

 

 

Month as a whole

Eight out of the last ten Januarys have been warmer than the long term average

 

 

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