Tonbridge-Weather.org.uk

SEPTEMBER 2013 daily and monthly summary

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SEPTEMBER 2013
October


September monthly summary site stats
* Compared to site averages 1985 - 2012.
‡ SUN:
Sunshine hours are calculated approximately and solely from solar radiation readings, but note that the solar sensor's exposure to sunshine is limited. The sensor receives less than 80% of total possible sunshine exposure this month due to building obstruction while the sun is low in the sky. There is no allowance for sunshine by visual observation only, so the sunniest day figures above can be very significantly less than the actual daily sunshine duration.
THW = Shaded Heat Index calculated with cooling/warming effect of wind and humidity to give an apparent temperature.
THSW = Unshaded Heat Index calculated with cooling/warming effect of wind, humidity and full direct sunshine to give an apparent temperature.
EVAPO-TRANSPIRATION is drying effect due to sun and wind, and is equivalent to "negative rainfall"

   DAILY STATS SEPTEMBER 2013
 
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
9.6 19.6 19.3 47 7.7 6.3 1028.3 FS 0.0 1.6 13 SW  Sunny spells
2nd
11.2 25.3 23.5 52 13.1 9.5 1025.4 FS 0.0 1.5 12 SSW  Sunny periods
3rd
12.6 26.1 24.8 52 14.3 7.2 1025.7 FS 0.0 0.2 7 SE  Sunny spells
4th
11.6 27.7 27.0 43 13.4 10.3 1018.7 F 0.0 0.7 13 SE  Sunny
5th
13.7 30.2 29.9 37 13.7 10.5 1008.4 F 0.0 0.8 12 SW  Sunny
6th
14.2 18.3 15.7 82 12.7 1.5 1007.7 ST 0.8 1.6 12 SW  Rain am
7th
9.6 18.8 17.9 53 8.2 8.2 1014.9 RS 1.0 2.4 21 SW  Rain am
8th
7.6 18.3 16.3 54 7.0 5.0 1017.7 ST 4.8 1.6 18 SW  Rain pm
9th
5.9 13.0 12.9 90 11.3 0.1 1013.9 FS 1.8 0.3 7 N  Rain pm
10th
8.4 16.5 16.4 54 7.1 2.0 1019.3 ST 0.3 2.2 18 N  Drizzle eve.
11th
11.4 17.1 16.3 61 8.8 1.3 1019.7 ST 0.0 2.8 19 N  Cloudy
12th
12.3 18.3 16.6 73 11.7 2.0 1018.7 FS 0.8 0.5 7 SSW  Rain am
13th
13.0 19.7 19.0 85 16.4 0.3 1016.8 FS 11.4 1.0 12 SW  Rain
14th
9.3 13.2 12.8 84 10.2 0.0 1015.2 RS 0.5 1.9 14 N  Rain pm
15th
5.3 15.4 14.3 73 9.5 3.0 1006.9 F 2.8 3.4 24 SW  Rain pm
16th
7.4 14.6 13.3 71 8.1 7.5 1001.1 FS 1.3 2.8 24 SW  Rain shower pm
17th
7.3 14.8 11.6 87 9.5 2.0 998.9 F 12.7 1.9 17 SW  Rain pm
18th
10.1 16.3 14.7 65 8.2 3.7 1004.6 R 0.0 1.6 12 N  Cloudy
19th
7.0 16.2 13.9 86 11.6 1.0 1007.6 F 0.5 2.4 21 SW  Rain pm
20th
8.8 19.2 18.0 55 8.8 4.8 1018.8 RS 0.0 1.2 10 SW  Sunny spells pm
21st
9.0 17.8 17.4 76 13.1 1.5 1024.5 ST 0.0 1.3 12 SW  Cloudy
22nd
16.1 18.4 18.3 82 15.2 0.0 1027.6 FS 0.0 0.6 6 SSW  Overcast
23rd
11.8 21.8 21.0 64 13.9 3.8 1023.1 F 0.0 0.2 7 SE  Sunny pm
24th
11.8 22.8 21.9 63 14.6 4.7 1014.2 FS 0.0 0.2 7 SE  Fog am
25th
11.8 21.3 20.7 70 15.0 2.3 1009.8 FS 3.0 0.0 0 Calm  Cloudy
26th
13.1 19.2 18.8 57 10.1 6.3 1016.6 ST 0.0 0.6 11 SW  Sunny spells
27th
8.9 17.3 17.1 60 9.3 6.7 1014.7 FS 0.0 0.6 10 E  Hazy sunshine
28th
11.2 19.0 16.6 75 12.1 3.5 1008.0 FS 1.0 0.8 12 SE  Rain eve
29th
12.7 16.6 16.2 71 11.0 2.2 1005.3 ST 0.0 1.1 12 ENE  Cloudy
30th
11.2 19.3 19.1 57 10.3 3.0 1005.5 ST 0.0 0.6 10 ESE  Fair
                         
‡ SUN: Sunshine hours are calculated approximately and solely from solar radiation readings, but note that the solar sensor's exposure to sunshine is rather limited. The sensor receives less than 65% of total possible sunshine exposure this month, and there is no allowance for sunshine by visual observation only, so the figures above can be very significantly less than the actual daily sunshine duration.
† Barometer trend (previous 3 hours) : F = falling, ST = steady, R = rising; Q = quickly, S = slowly
Weather Notes use METAR codes: OVC = overcast; SHRA = rain showers; '+' = heavy; CAVOK = no cloud below 5000 ft & visibility> 10 km & no fog, precipitation or snow; SN = snow; RASN = Rain and snow

1st
HP 1034 hPa south of Ireland at 50N. Mainly cloudy but bright with sshort sunny spells. More cloudy from mdi-afternoon.
2nd
Long sunny spells but with patchy cirrus and some haze in the morning. Some medium height clouds in the afternoon as the cirrus clears and still mainly sunny.
3rd
A mixture of cloudy and sunny spells. More cloudy at the start and middle of the day with long sunny spells in midmorning and in the afternoon.
4th
Hazy but sunny morning. Staying sunny and mainly clear with occasional small patches of high cloud in the middle of the day.
5th
Very hazy to start, a sunny morning with only thin high cloud. Staying sunny in the afternoon but more cloud building at lower heights. Hottest September day in these site records.
6th
LP 1005 hPa North Sea and 1009 hPa Cornwall. A spell of mainly light rain in late morning and lunchtime. Brightening later in the afternoon with some sunny intervals.
7th
A spell of rain in the night, and a couple of brief showers in the morning. Sunny spells developing in late morning through to the evening.
8th
A bright morning with sunny spells. Rain showers in the afternoon and a longer spell of heavier rain between 17 - 18.00h.
9th
A cheerless September day: gloomy and cool with intermittent light drizzle and a short spell of heavy rain in mid-afternoon. Just a very brief glint of brightness after it cleared.
10th
A fairly bright morning with a few sunny spells and intervals. Clouding over in the afternoon with some light drizzle in the evening.
11th
Dull start, becoming brighter in the middle of the day. Cloud thickens again in the afternoon and a dull end to the day.
12th
Some light rain and drizzle in the early morning. Mainly cloudy with a few short spells of brightness.
13th
HP 1028 hPa Azores, LP 977 hPa NE of Iceland with long trailing fronts over the UK. A spell of moderate/heavy rain in the night followed by intermittent drizzle in the morning. Some brief brightness quickly disappears as more rain arrives in the afternoon and lasts into the night.
14th
Still one more gloomy and dank day with a spell of rain in late afternoon.
15th
LP 966 hPa Faroe Islands. A sunny morning until fronts sweep in from the NW from lunchtime bringing wind and outbreaks of rain.
16th
For a change, a mainly sunny day with a heavy rain shower in early afternoon.
17th
LP 994 hPa W Ireland. A bright start with some sunny intervals. Clouding over with rain from early afternoon, heavy at first becoming drizzly. Another period of heavy rain in late evening.
18th
The LP moves quickly ESE into Germany overnight. A day of bright and cloudy spells with more sunshine in the morning than afternoon.
19th
Mainly cloudy morning with short lived brightness near to midday. A spell of light rain and drizzle in the afternoon .
20th
A cloudy morning. Cloudsheet break in early afternoon to give sunny spells.
21st
A cloudy day, bright until late afternoon with two brief sunny intervals. Overcast and dull end to the day.
22nd
HP 1029 hPa Normandy. Despite high pressure, an overcast and gloomy day with no brightness at all.
23rd
Misty and murky to start clearing to give overcast skies which slowly brightened. The cloud breaks and dissipates after midday to give a sunny afternoon .
24th
Dense fog in the morning with visibility around 80m early on, slowly improving. Fog clears just after 11.00 to give sunny spells.
25th
A little misty early on, brightening up but a moderate rain shower around 10.00. A fine day afterwards with spells of milky sunshine through high cloud and haze. Rain in late evening for a couple of hours.
26th
A cloudy morning but clearing after 10.30 to give some long sunny spells with patches of mainly thin high cloud.
27th
A bright day but with much high cloud making sunshine rather weak and watery at times.
28th
Mainly bright with some sunny spells and a very brief spell of light rain around noon. A band of more persistent rain in late evening.
29th
A mainly cloudy day, a brighter spell with sunny intervals in the middle of the day before cloud returns.
30th
A bright day but limited sunshine due to medium and high cloud.