Tonbridge-Weather.org.uk

DECEMBER 2016 daily and monthly summary

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DECEMBER 2016
January 2017


December 2016 Monthly summary stats
* Compared to site averages 1985 - 2015.
‡ SUN:
Bright sunshine hour totals are estimated from a combination of solar radiation measurement/sky brightness, and observation; corroborated to some extent by the nearest UKMO stations.
Temp/Hum/Wind = Shaded Heat Index calculated with cooling/warming effect of wind and humidity to give an apparent temperature.
Temp/Hum/Sun/Wind
= Heat Index calculated with strength of sunshine, cooling/warming effect of wind and humidity to give an apparent in the sun temperature.

   DAILY STATS DECEMBER 2016
 
TEMPERATURE ºc
HUMIDITY
SUN ‡
PRESSURE
RAINFALL
WIND SPEED
DIRECTION
 WEATHER
 NOTES
DATE
Low
(21-09h)
High
(09-21h)
Temp at 14.00z
RH %
at 14.00z
Dewpoint ºc
at 14.00z
Bright
sun hrs
hPa   †
at 14.00z
Day Total
(mm)
Average
(mph)
Max Gust
(mph)
Dominant
(Compass)
 Precipitation
 type etc ‡
                       
1st
-3.6 8.4 8.4 74 4.0 7.2 1029.7 F 0.0 0.7 6 SSW  Sunny
2nd
1.9 7.4 7.4 86 5.2 0.0 1026.1 FS 0.0 0.0 3 SW  Cloudy
3rd
4.5 7.9 6.8 68 1.3 4.2 1024.9 FS 0.0 0.7 12 ESE  Sunny am
4th
0.3 6.7 6.6 58 -1.1 6.8 1022.9 FS 0.0 0.5 7 ESE  Sunny
5th
-3.6 5.8 5.7 86 3.6 5.2 1024.3 ST 0.2 0.0 3 ESE  Sunny am
6th
0.2 9.3 6.2 97 5.8 0.0 1027.4 FS 0.0 0.1 5 ESE  Fog
7th
6.0 12.8 12.7 83 9.9 0.2 1026.5 FS 0.0 1.9 12 SW  Cloudy
8th
10.2 13.0 12.6 84 9.9 0.0 1025.4 FS 0.0 2.8 15 SSW  Cloudy
9th
11.0 13.3 12.8 87 10.7 2.0 1025.9 F 0.0 2.2 12 SW  Cloudy
10th
10.4 12.3 12.2 94 11.3 0.0 1021.1 F 2.2 3.2 21 SSW  Rain eve.
11th
3.4 9.3 9.2 86 6.9 6.5 1025.2 FS 0.2 1.1 8 SSW  Sunny
12th
0.3 10.3 7.7 97 7.3 0.0 1022.2 F 0.6 0.4 8 ESE  Rain eve.
13th
6.7 11.8 11.7 97 11.3 0.0 1020.0 FS 0.6 1.0 10 SSW  Drizzle
14th
7.2 12.2 12.1 81 8.9 4.0 1019.8 FS 0.2 0.1 6 ESE  Fog am
15th
3.1 10.2 10.0 94 9.1 0.5 1018.6 F 0.2 0.0 6 ESE  Drizzle night am
16th
4.7 8.9 8.7 95 7.9 0.0 1026.1 RS 0.0 0.0 3 ESE  Overcast
17th
1.8 7.1 6.8 98 6.5 0.0 1038.3 RS 0.0 0.1 4 NW  Fog
18th
5.4 8.2 8.2 97 7.7 0.0 1034.9 F 0.0 0.0 4 SW  Overcast
19th
4.9 7.1 7.0 95 6.3 0.0 1025.6 F 0.6 0.0 4 ESE  Drizzle eve.
20th
1.7 5.2 5.1 92 3.9 0.0 1020.6 FS 0.0 0.3 8 ESE  Cloudy
21st
4.6 10.3 10.3 95 9.5 0.0 1019.9 ST 2.0 2.8 17 SSW  Rain
22nd
2.1 8.8 8.4 81 5.3 3.8 1028.4 ST 0.0 0.6 9 SSW  Fog am
23rd
2.5 10.4 9.2 88 7.3 0.0 1024.9 FQ 2.2 3.0 22 SSW  Rain eve.
24th
5.3 9.4 9.1 78 5.4 0.0 1027.2 FS 0.0 3.7 19 SSW  Cloudy
25th
9.4 12.6 12.3 90 10.7 0.1 1023.7 FS 0.0 5.1 23 SSW  Cloudy
26th
6.4 8.0 7.8 64 1.4 3.5 1034.5 R 1.2 2.3 18 SSW  Rain night am
27th
-1.3 6.3 6.2 82 3.3 4.5 1044.4 ST 0.0 0.1 6 SSW  Sunny am
28th
-2.4 3.8 3.5 98 3.2 2.2 1042.3 F 0.2 0.1 3 E  Fog am & eve
29th
-3.5 5.2 5.1 98 4.8 6.7 1036.5 F 0.2 0.0 4 ESE  Sunny
30th
-1.4 2.4 2.1 98 1.8 0.0 1036.5 FS 0.4 0.5 7 SW  Fog
31st
0.6 7.1 6.8 99 6.6 0.3 1030.5 F 0.0 0.8 9 SSW  Fog am
                         
‡ SUN: Sushine hours are calculated approximately from solar radiation and sky brightness readings, but note that the solar sensor's exposure to sunshine during this month is limited to early afternoon. The sensors receive less than 30% of total possible sunshine exposure this month. Visual observations are made for the remainder of the daylight hours.
† Barometer trend (previous 3 hours) : F = falling, ST = steady, R = rising; Q = quickly, S = slowly

1st
HP 1033 hPa Ireland. Hard ground frost followed by a sunny day with very little cloud.
2nd
HP 1029 hPa NW Scotland. A very cloudy day with little change in the sky through daylight hours.
3rd
HP 1029 hPa North Sea. Early cloud clears to give a long sunny spell until cloud returns by midday. A more cloudy afternoon with sunny intervals.
4th
HP 1032 hPa Germany. Ground frost with a clear start to the day. A long period of sunshine with a few patches of high cloud from mid-afternoon.
5th
HP 1027 hPa North Sea. Ground frost with a sunny start but a little hazy. Staying sunny but haze increases in the early afternoon and becoming cloudy later. Precipitation is from frost melt.
6th
HP 1034 hPa Germany, LP 987 hPa SSW of Iceland. Foggy with visibility < 200m for much of the day. Visibility improves for a short while in the afternoon before the fog thickens again later but clearing a little by nightfall with milder air sweeping in.
7th
A cloudy day with the best of the brightness in the morning but the sky never clears of cloud to any degree.
8th
HP 1038 hPa Switzerland, A very cloudy day, rather briefly brighter in late morning but an overcast and gloomy afternoon.
9th
Mostly overcast in the morning, brightening to give spells of hazy sunshine after midday.
10th
HP 1030 hPa Sardinia, HP 1027 hPa Azores, LP 986 hPa S of Iceland. Overcast and very dull all day with a spell of rain from early evening.
11th
A little drizzle continued overnight. After some patchy early cloud, a long sunny period before cloud builds up towards late afternoon.
12th
An overcast and very dull day with intermittent light rain and drizzle mainly in the evening.
13th
Another overcast and very dull day with drizzle through the morning and early afternoon.
14th
Foggy first thing with visibility down to around 150m, only slowly clearing during the morning. Sun breaks though in late morning to give a sunny period although hazy at times with some high cloud.
15th
HP 1033 hPa Baltic Sea, LP 969 hPa SSW of Iceland. A little drizzle in the dark hours, overcast and gloomy morning. A spell of brightness in the middle of the afternoon as sky clears temporarily.
16th
An overcast, dull and rather murky day.
17th
Fog lasts all day with variable visibility from 100m to 500m.
18th
HP 1037 hPa Central France. An overcast day, slightly brighter for short spells in the morning but dull in the afternoon.
19th
HP 1038 hPa Hungary. Another overcast day, dull and especially so in the afternoon. A spell of drizzle crossing from the east after sunset.
20th
A very cloudy day, although the cloud is broken at times, especially in the morning, the sun does not break through.
21st
Yet another overcast and gloomy day, this time with intermittent light rain and drizzle during the night and the day.
22nd
HP 1038 hPa Hungary. Misty at sunrise, thickening later to fog with visibility of 200m but clearing slowly. Sunshine breaks through, hazy at first towards late morning but more cloudy by mid afternoon.
23rd
LP 950 hPa just S of Iceland. Low cloud pushes in from the west early on to give and overcast day and another rather dull afternoon. A spell of rain in the evening with squally gusts for a short time.
24th
Cloudy with no real breaks in the cloudsheet but not dull.
25th
Windy and very cloudy but with some small breaks allowing a brief glimpse of sunshine in the middle of the day.
26th
A spell of heavy rain in the early hours. After the cloud clears, a long sunny spell from mid-morning. After midday an area of very slow moving high cloud blocks the sunshine despite the northern half of the sky remaining clear.
27th
HP 1045 hPa SE England. A ground frost and a clear start. A sunny period lasting until early afternoon when once again thin high cloud thickens enough to obscure the sun.
28th
HP 1046 hPa central Germany. Dense, freezing fog with visibility at little more than 100m for the whole morning, causing black ice on roads/pavements. Very slowly clearing after midday with sunshine breaking through just after 13.00. Fog reforms in the late evening. Precipitation is from condensation/frost melt.
29th
HP 1044 hPa southern Poland. A clear start with a hard ground frost and black ice again. Sunny and virtually cloudless all day.
30th
HP 1041 hPa Austria. Foggy all day with visibility for the most part little more than 100m, but briefly up to around 300m. Late in the night the fog clears for a time. Precipitation is again from condensation and frost melt.
31st
HP 1036 hPa Switzerland. Early fog with visibility down to 100m, clearing by mid-morning to an overcast sky. Staying cloudy but with a couple of brief sunny intervals.