Klitch's Tonbridge Weather Station
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This page contains the December 2004 monthly stats and daily summaries for my own site readings.

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Back to November 2004
DECEMBER 2004
January 2005

December 2004 was slightly milder and drier than average. There were 17 consecutive days from the 29th November to 15th December without measurable rainfall, the longest dry spell at this time of year since 1991 (18 days). The first half of the month saw the continued persistence of high pressure to the SE; with the consequences of no rainfall, light winds, little sunshine and a great deal of anticyclonic gloom. The first air-frost of this autumn/winter was recorded on the 11th - the first sub-zero here since the 3rd March. Visibility was poor to moderate with frequent haze or mist and occasional dense fog.The second half of the month begins with the return of Atlantic weather systems pushing across the country, and a vigorous depression brings gales and the first heavy rainfall since the 18th November. A further deep depression brought wind, rain and mild conditions on the 22nd, but although it turned colder on the night of the 24th, there was no "white Christmas" with cool, bright and dry weather prevailing. There was a heavy ground frost on Boxing Day morning and the weather turned from cool to very mild at the end of the month.


  DECEMBER 2004 - MONTHLY SUMMARY
 TEMPERATURE
 Average Maximum
7.9
ºc   (+0.2)*
 Average Minimum
3.6
ºc   (±0.0)*
 Monthly Mean
5.7
ºc   (+0.1)*
 Highest Maximum
12.4
ºc   (23rd)
 Lowest Minimum
-2.2
ºc   (20th)
 Days with Minimum <0ºc
4
 
 Lowest wind chill
-2.2
ºc   (20th)
 RAINFALL
 Monthly Total
50.7
 mm     (-26.2)*
 Total Wet Days (>0.3mm)
8
          (-10)*
 Total Dry Days
23

          (+10)*

 Highest Daily Total
17.3
 mm     (17th)
 Highest Rain Rate
33.5
 mm/hr (28th)
 Snow Cover
0
 days
 WIND
 Monthly Average
1.6
 mph
 Highest Gust
26.0
 mph  (24th)
 Dominant Directions
SW
 (26.1%)
SSW
 (17.0%)
WNW
 (12.9%)
N
 ( 9.8%)
 DEWPOINT
 Average at 14.00h
3.7
ºc
 Highest Reading
9.3
ºc   (22nd)
 Lowest Reading
-4.2
ºc   (20th)
 RELATIVE HUMIDITY
 Average at 14.00h
78
 Lowest Reading
51
%   (20th)
 Monthly Average
82
%
 BAROMETER
 Monthly Mean
1017.0
 hPa
 Highest Reading
1032.1
 hPa  (8th)
 Lowest Reading
982.2
 hPa  (17th)

      DECEMBER 2004
TEMPERATURE ºc
HUMIDITY
RAINFALL
WIND SPEED
WIND DIRECTION
DATE
Minimum
(< 09:00h)
Maximum
(< 21:00h)
RH %
at 14.00
Dewpoint ºc
at 14.00
Day Total
(mm)
Average
(mph)
High Gust
(mph)
Dominant
(Compass)
1st
0.9
6.0
77
2.2
0.0
0.2
6.0
N
2nd
2.8
6.0
83
3.3
0.0
0.3
6.0
N
3rd
1.3
4.4
88
2.0
0.0
0.5
7.0
WNW
4th
1.6
9.5
84
6.5
0.0
0.1
5.0
WSW
5th
6.9
11.0 
80
7.7
0.0
0.5
7.0
SSW
6th
4.5
11.4 
65
4.8
0.0
0.8
13.0 
SW
7th
0.6
9.3
81
5.9
0.0
0.0
3.0
NNW
8th
7.4
8.9
88
7.0
0.0
0.1
6.0
SE
9th
3.0
8.9
74
4.1
0.0
0.3
8.0
SE
10th
3.4
6.9
75
2.8
0.0
0.6
8.0
SW
11th
-1.7 
5.7
90
2.3
0.0
0.1
8.0
WNW
12th
4.8
5.5
82
1.7
0.0
1.0
11.0 
SE
13th
1.1
3.1
82
2.0
0.0
0.4
6.0
SE
14th
2.5
9.2
86
6.7
0.0
1.6
12.0 
SW
15th
8.9
11.1 
85
8.7
0.0
2.9
19.0 
SW
16th
9.2
10.9 
83
6.8
1.8
4.2
25.0 
SW
17th
6.6
7.4
88
3.7
17.3 
4.9
25.0 
N
18th
2.5
7.6
75
3.4
5.3
1.8
12.0 
SW
19th
4.1
5.3
67
-0.8 
4.6
1.4
18.0 
N
20th
-2.2 
5.9
54
-3.1 
0.3
0.9
13.0 
SW
21st
1.5
3.5
90
0.9
0.0
0.8
11.0 
N
22nd
2.1
11.1 
91
8.1
6.9
3.9
21.0 
SW
23rd
10.6 
12.4 
70
6.9
0.0
4.6
22.0 
WNW
24th
8.1
10.4 
79
6.9
5.1
4.9
26.0 
SW
25th
1.9
4.4
72
-0.2 
0.0
1.4
12.0 
SSW
26th
-1.8 
3.9
69
-1.3 
0.0
0.8
12.0 
N
27th
-1.2 
5.1
77
0.8
0.5
1.3
14.0 
SW
28th
3.2
6.3
64
0.0
8.9
3.6
20.0 
N
29th
2.8
8.6
74
3.0
0.0
1.9
12.0 
SW
30th
7.1
12.2 
68
6.3
0.0
2.6
14.0 
SW
31st
7.9
11.7 
75
7.4
0.0
2.7
17.0 
SW
 

'WIND ROSE' PLOT FOR THE MONTH
The 'petals' represent wind direction and the length represents frequency, i.e. in this case winds from the SW were the most common, followed by the SSW.

The colours represent the strength of the wind, with black being weakest through dark and medium blue then lighter colours (cyan, light green, yellow, magenta, red) being stronger