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JULY 2006 daily and monthly summary

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JULY 2006
August 2006


Note
A total hosepipe and sprinkler ban is in effect in South East Water & Mid Kent Water supply areas until further notice.
9th - 15th
Passage of weak fronts at first which bring some light rain and gusty conditions. Pressure starts to build with a ridge from the Azores high. Another passage of fronts on the 13th bring cloud but no rainfall. HP settles in the North Sea, sending cooling breeze across the SE.
16th - 21st
High pressure extends across Ireland through to Denmark and the Met Office issues a Level 3 heatwave warning. The HP slips SE wards to drag ever warmer air from the continent. The maximum of 36.1 ºC recorded on the 19th is a new site record for July. A record low of 18% relative humidity was also registered. Although there is a slight cooling thereafter it remains very hot and mostly sunny, with HP zones now to the S and E.
22nd - 28th
Overnight thunderstorms on the 22nd followed by sunshine and a steep climb in temperature in the morning. More thundery showers at midday bring a drop in temperature although it remains humid. 23rd starts cloudy but becomes sunny and very warm again later. Continuing mostly hot and sunny with thunderstorm early morning 26th.
29th - 31st
The 2 week heatwave is effectively over although it remains warm and sunny. A large low sits W of Ireland bringing cooler Maritime rather than Continental air and an increasingly strong breeze. Nonetheless the Met Office confirm July 2006 was the warmest calendar month since records began, with unusually high sunshine and low rainfall totals too.

 JULY 2006 - MONTHLY SUMMARY
 TEMPERATURE
 Average Maximum 27.2
ºc 
 (+4.7)
 Average Minimum 15.3
ºc 
 (+2.2)
 Monthly Mean 20.8
ºc 
 
 Highest Maximum 36.1
ºc 
 (19th)
 Lowest Minimum 11.7
ºc 
 (14th)
 Days Max >= 25º 18
 
   
 
 AMBIENT TEMPERATURE
 Low Wind Chill 11.7
ºc 
 (14th)
 Low Heat Index (THW) 11.6
ºc 
 (14th)
 High Heat Index (THW) 35.2
ºc 
 (19th)
 High Sun Index (THSW) 41.4
ºc 
 (19th)
    
 
 RAINFALL
 Monthly Total 17.8
 mm
(42%)
 Rainy Days (=>0.2mm) 9
(-2)
 Inc days =>1mm) 7
 
 Dry Days 22
(+2)
 Highest Daily Total 6.6
 mm
 (22nd)
 Highest Rain Rate 29.0
 mm/hr
 (22nd)
   
 EVAPO-TRANSPIRATION
 Highest Daily 4.9
 mm (2nd)
 Monthly Total 110.7
 mm
 WIND
 Monthly Average 1.5  mph  
 Highest Gust 24  mph (9th)
 Dominant Directions SSW  (40%)
SE  ( 9%)
ESE  ( 9%)
NNW  ( 7%)
     
 SUNSHINE†
 Sunniest Day 8.8  hrs (17th)
 Monthly Sunshine 191.7  Hours
 Peak Solar Rad. 1182  w/m² (23rd)
 Total Solar Energy 13165  Langleys
 
   
 DEWPOINT
 Average at 14.00h 12.8 ºc
 Highest Reading 18.7 ºc  (22nd)
 Lowest Reading 6.5 ºc  (17th)
 RELATIVE HUMIDITY
 Average at 14.00h 47 %
 Lowest Reading 18 % (19th)
 Monthly Average 63 %
 BAROMETER
 Monthly Mean 1018.2  hPa  
 Highest Reading 1031.4  hPa (13th)
 Lowest Reading 1006.8  hPa (31st)
‡ 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 only 65% of total possible sunshine exposure this month. 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.
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 JULY 2006
 
TEMPERATURE ºc
HUMIDITY
SUN ‡
PRESSURE
RAINFALL
WIND SPEED
DIRECTION
DATE
Minimum
(21-09h)
Maximum
(09-21h)
RH %
at 14.00
Dewpoint ºc
at 14.00
Bright
sun hrs
hPa   †
at 14.00
Day Total
(mm)
Average
(mph)
High Gust
(mph)
Dominant
(Compass)
                   
1st
12.6 29.6 41 14.6 8.7 1021.8 f 0.0 0.4 11 ESE
2nd
16.4 31.7 28 10.2 8.3 1018.5 fs 0.0 0.7 12 SE
3rd
14.9 31.2 31 11.6 8.8 1014.3 fs 0.0 0.5 12 NNW
4th
17.1 30.4 43 15.2 5.7 1014.0 st 0.3 0.5 21 ESE
5th
17.7 24.9 65 16.0 4.8 1013.0 rs 1.0 1.6 19 SSW
6th
16.3 22.2 70 14.4 3.2 1015.9 st 0.0 2.3 13 SSW
7th
16.4 21.5 63 12.5 0.5 1017.0 st 0.8 1.7 16 SSW
8th
13.6 21.7 44 7.9 7.5 1016.8 fs 0.0 2.5 19 SSW
9th
13.7 20.9 71 12.9 4.2 1011.0 rs 2.3 3.9 24 SSW
10th
13.3 22.7 61 14.7 2.3 1022.2 st 1.5 2.0 14 SSW
11th
16.3 24.6 43 10.2 7.3 1023.7 rs 0.0 1.5 11 SSW
12th
12.4 26.6 38 9.9 8.7 1023.7 fs 0.0 1.2 13 SSW
13th
14.3 23.0 64 13.3 0.3 1025.9 rs 0.0 1.0 13 NNW
14th
11.7 21.5 46 9.3 7.3 1031.2 st 0.0 2.2 18 N
15th
13.7 23.5 42 9.2 8.3 1029.4 fs 0.0 1.5 13 ENE
16th
14.1 30.1 29 9.4 8.7 1025.8 f 0.0 0.7 12 NNW
17th
13.1 31.8 29 10.7 8.8 1024.0 fs 0.0 0.5 10 NNW
18th
13.6 33.1 30 12.3 8.8 1019.9 fs 0.0 0.5 11 NNW
19th
17.2 36.1 28 14.0 6.8 1014.2 f 0.0 1.0 16 ESE
20th
17.6 28.6 41 13.3 7.3 1016.9 st 0.0 2.7 18 SSW
21st
15.9 31.7 36 14.4 7.2 1019.2 f 0.0 0.8 16 SE
22nd
18.4 28.3 83 17.6 1.7 1015.4 rs 6.6 1.0 18 SSW
23rd
15.4 26.0 60 15.5 5.0 1019.1 st 0.0 1.5 12 SSW
24th
15.1 29.3 50 15.3 5.2 1020.0 fs 0.0 0.5 11 ESE
25th
16.6 33.0 33 13.1 8.3 1017.1 fs 0.0 1.0 13 SE
26th
18.2 32.5 36 15.5 5.8 1015.8 fs 2.5 1.1 16 SSW
27th
17.5 28.7 54 16.1 6.2 1015.1 fs 0.0 1.2 13 SSW
28th
16.4 28.4 44 13.7 7.8 1012.1 fs 0.0 1.3 11 SSW
29th
14.4 24.5 46 11.6 6.5 1009.1 st 0.0 2.7 18 SSW
30th
15.9 24.3 43 10.0 6.0 1010.4 st 0.0 3.6 18 SSW
31st
16.0 21.7 60 12.8 5.7 1010.5 fs 1.8 4.0 21 SSW
                     
‡ 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 only 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