Page updated January 1, 2010 15:51
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AWS Humidity sensor recalibrated 31/12/09

Epping Weather Site
December 2009(Means and totals to date are at foot of table) Monthly Summary
 
  0900 hours readings
 Daily  Readings (See notes at foot of page)
Weather in previous 24h (to 0900 on date)Blue >50% snow cover @09
Date
Date
Pressure
(mb)
Temperature
(°C)
Relative
Humidity
(%)
Wind
Speed
(mph)
Wind
Direction
Soil Temp
at 20cm
(°C)
1Maximum
Temperature
(°C)
2Minimum
Temperature
(°C)
3Rainfall
(mm)
4GrassMin
Temp (°C)
5Sunshine
(Hours)
6Max
Wind Speed
(mph)
1
1013.0
0.2
91
2
N
5.0
7.4
-0.3
1.0
-3.3
4.93
13
 Mainly cloudy, clear overnight
1
2
999.6
7.4
94
3
SE
5.0
9.8
0.2
9.8
3.0
0.66
16
 Sunny periods then, rain am 2nd
2
3
995.4
6.8
95
6
WSW
5.5
7.1
6.6
2.5
6.0
0.00
23
 Rain pm 2nd
3
4
1007.2
2.2
82
7
W
5.5
8.9
2.0
3.8
-1.0
5.09
21
 Rain 3rd, clear overnight
4
5
998.9
7.7
90
7
SW
5.5
12.0
4.8
7.6
2.0
3.11
19
 Sunny periods 4th, rain overnight
5
6
991.1
11.1
93
10
SSW
8.0
11.1
7.7
0.8
6.7
3.84
30
 Rain pm 5th and later am 6th
6
7
1001.6
8.7
90
5
SSW
7.0
10.6
6.5
1.8
3.8
0.00
21
 Sunny intervals.Turning cooler 6th
7
8
1010.1
5.4
90
5
WSW
7.0
10.9
4.2
0.8
2.8
3.34
17
 Rain pm 7th, shower am 8th 
8
9
1017.6
8.9
94
2
SSW
8.0
11.3
5.4
0.2
4.4
0.16
15
 Sunny intervals. Rain overnight
9
10
1025.9
6.2
88
8
WNW
8.0
8.4
6.1
0.1
5.0
6.75
22
 Cloudy 9th, shower am 10th 
10
11
1033.0
3.7
94
4
NNE
6.0
5.9
1.5
0.0
-1.7
1.49
14
 Sunny 10th. Fog am 11th 
11
12
1031.7
3.9
96
6
N
6.0
5.9
2.9
0.2
0.6
4.87
22
 Fog am 11th, clearing pm.
12
13
1028.3
3.4
91
4
NNE
5.0
5.8
2.4
0.4
-0.6
1.52
20
 Sunny intervals, occ rain showers 
13
14
1023.1
0.8
92
0
NE
4.0
3.4
-0.3
0.0
-3.3
2.04
8
 Light rain showers pm 13th
14
15
1019.5
-1.3
88
3
SE
3.5
1.4
-1.4
0.0
-2.8
5.15
10
 Sunny intervals. Cloudy pm 14th
15
16
1013.3
-1.4
88
3
S
2.5
2.7
-2.9
3.8
-3.6
0.00
13
 Sunny periods, frost19.5h<0º 09-09
16
17
1008.5
0.7
93
12
N
2.0
2.9
-1.4
4.0
-1.6
1.66
40
 Snow am 16th turning to rain pm 16
17
18
1014.2
-1.9
91
8
NE
2.0
-0.2
-2.4
0.0
-3.3
2.51
34
 Snow+strong winds o'nt. 4cm 09 18
18
19
1012.9
-4.3
89
4
NW
1.0
0.8
-4.4
2.0
-6.1
6.58
19
 Ice day. Sunny int'vls+flurries.  4cm
19
20
998.1
-3.7
84
7
NNW
1.0
0.4
-4.3
0.0
-5.6
6.77
18
 Sunny periods. Snow o'nt 4cm 09
20
21
994.5
-2.5
86
4
SE
1.0
1.7
-3.7
6.6
-6.1
0.00
16
 Sunny periods. Snow 4cm 09 21st 
21
22
985.6
-0.7
94
6
E
1.0
0.4
-0.8
0.0
-5.6
4.50
14
 H'vy sn pm 21.Lt sn am 22 6cm 09 
22
23
991.4
-2.5
93
2
SW
1.0
3.1
-3.1
5.9
-6.4
3.41
22
 Sunny periods,fog o'nt. 5cm sn 09
23
24
988.8
2.1
96
2
SSE
1.5
4.1
-2.5
2.6
-0.6
0.00
11
 Rn/Sn/hl sh am 23, RN pm 2cm09 
24
25
996.2
1.2
99
6
WNW
2.0
6.7
1.2
0.6
0.1
3.67
21
 Rain am 24th. Shower am 25th 
25
26
1000.6
6.3
91
10
S
3.0
8.1
1.2
1.0
-1.1
0.55
20
 Sunny intervals 25th. Rain am 26th 
26
27
995.7
5.2
83
9
SSW
4.0
6.2
4.5
0.1
2.8
1.99
28
 Shower am 26th
27
28
1004.9
-0.9
90
0
Calm
3.0
3.5
-1.4
0.2
-3.8
2.94
18
 Clear and frosty am 28th 
28
29
997.1
3.1
95
12
ENE
3.0
3.8
-0.9
13.7
-0.6
0.00
28
 Sunny intervals 28th 
29
30
990.9
3.7
100
12
NE
3.5
3.7
2.6
3.8
2.2
0.00
20
 Rain. Fog/low cloud am 30th 
30
31
999.4
2.1
85
9
ENE
3.0
3.0
2.1
0.2
1.7
0.00
22
 Rain pm 30th. Dry overnight 
31
Total/
Mean		            
5.5º
1.0º
73.5mm
77.53hrs
  
Weather in previous 24h (to 0900 on date)Blue >50% snow cover @09
Date
Anomaly
            
-1.6º
-1.7º
127.6%
172.3%
  
 
Pressure
(mb)
 Temperature
(°C)
Relative
Humidity
(%)
Wind
Speed (mph)
Wind
Direction
Soil Temp
at 20cm
(°C)
1Maximum
Temperature (°C)
2Minimum
Temperature
(°C)
3Rainfall
(mm)
4GrassMin'm
Temperature
(°C)
5Sunshine
(Hours)
6Maximum
Wind Speed
(mph)
 
  0900 hours readings
Daily Readings (see notes below)  
    

 

Notes
1. For the 24 hours from 0900UTC* on the date to 0900UTC* on the following day. (The maximum temperature is generally in the afternoon*)
2. For the 24 hours ending at 0900UTC* on the date. (The minimum temperature is generally just after sunrise*)
*Where a maximum is overnight or minimum is during the day the figure is shown in italics. This often occurs in winter
3. For the 24 hours from 0900UTC* on the date to 0900UTC* on following day
4. For the period from sunset on previous day to 0900UTC* on the date
5.For the period sunrise to sunset on the date
6. For the period 0000UTC*-2400UTC* on the date i.e the Calendar Day
* UTC is Universal Time Coordinated. It has been adopted by the UK Met.Office in place of Greenwich Mean Time (GMT). When British Summer Time is in force UTC is BST minus one hour ,e.g.1000BST=0900UTC

 

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(amended January 2009)

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