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MARCH 2006 daily and monthly summary

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MARCH 2006
April 2006


Note A total hosepipe and sprinkler ban is in effect in South East Water & Mid Kent Water supply areas until further notice.
1st - 6th A cool but bright start to the month with long sunny periods. A low pressure system to the SW threatened wintry weather on the 3rd but passed well south and gave heavy snow to N France instead.
7th - 10th Becoming unsettled with a series of weather fronts bringing in maritime air, spells of rain and showers across the UK from the west. Winds turn to NW on the 10th.
11th - 16th Pressure rises to the NE, bringing winds from the N and another cool spell. Heavy snow fell in Scotland and northern England on the 11/12th, but conditions stayed mostly dry, bright and breezy here. Mixture of sunny days / anticyclonic gloom with chilly winds followed. The coldest first half of a March since 1987.
17th - 23rd Anticyclone to south of Iceland and low pressure in Biscay brings stronger NE'ly winds. Remaining dry and fresh with plenty of cloud. The pattern starts to change on the 23rd as an Atlantic low pushes towards the SW.
24th - 31st The surge of Tropical Maritime air pushes the temperature to its highest readings since last November. Becoming humid, very windy and mostly dull with frequent outbreaks of drizzle and rain. The 27th was the windiest day of 2006 so far.

 MARCH 2006 - MONTHLY SUMMARY
 TEMPERATURE
 Average Maximum 8.5
ºc 
 (-2.2*)
 Average Minimum 2.7
ºc 
 (-1.2*)
 Monthly Mean 5.1
ºc 
 
 Highest Maximum 13.9
ºc 
(26th)
 Lowest Minimum -4.4
ºc 
(2nd)
 Days with Min <=0ºc 10
 
   
 
 AMBIENT TEMPERATURE
 Low Wind Chill -4.4
ºc 
(2nd)
 Low Heat Index (THW) -4.5
ºc 
(2nd)
 High Heat Index (THW) 13.7
ºc 
(26th)
 High Sun Index (THSW) 21.8
ºc 
(24th)
    
 
 RAINFALL
 Monthly Total 39.0
 mm
(84%)*
 Rainy Days (=>0.2mm) 13
(-1)*
 Inc days =>1mm) 10
 
 Dry Days 18
(+1)*
 Highest Daily Total 7.9
 mm
 (30th)
 Highest Rain Rate 22.1
 mm/hr
 (31st)
   
 EVAPO-TRANSPIRATION
 Highest Daily 2.29
 mm (28th)
 Monthly Total 32.8
 mm
 WIND
 Monthly Average 2.8  mph  
 Highest Gust 32  mph (28th)
 Dominant Directions SSW  (38%)
N  ( 9%)
ESE  ( 7%)
ENE  ( 7%)
     
 SUNSHINE†
 Sunniest Day
6.2
 hrs (15th)
 Monthly Sunshine
60.2
 Hours
 Peak Solar Rad.
906
 w/m² (28th)
 Total Solar Energy
4595
 Langleys
 
   
 DEWPOINT
 Average at 14.00h 0.5 ºc
 Highest Reading 12.2 ºc   (26th)
 Lowest Reading -10.0 ºc   (1st)
 RELATIVE HUMIDITY
 Average at 14.00h 62 %
 Lowest Reading 29 % (5th)
 Monthly Average 73 %
 BAROMETER
 Monthly Mean 1009.3  hPa  
 Highest Reading 1031.3  hPa (12th)
 Lowest Reading 990.8  hPa (24th)
Sunshine Hours are approximate only and calculated from the sensor's limited exposure to direct sun, no allowance for visual only observation. As the sensor receives less than 55% of total possible sunshine exposure this month, the figures above can be very significantly less than the actual sunshine duration.
* = deviation from 20 year average. The monthly mean is calculated from all logged temperatures and is not the simple mean of the daily minimum and maximum.
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 MARCH 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
-2.0 5.7 35 -8.9 4.5 1004.4 fs 0.0 1.9 16 SSW
2nd
-4.4 5.9 48 -5.1 2.8 1001.1 fs 0.0 1.2 13 SSW
3rd
-1.5 6.1 56 -2.6 2.3 997.3 rs 0.0 0.3 8 SE
4th
-3.9 5.7 41 -6.7 3.8 999.8 st 0.0 1.2 12 SSW
5th
-0.8 7.2 35 -7.7 4.0 1009.8 r  0.0 2.1 16 SSW
6th
1.2 8.3 47 -3.5 2.2 1019.1 st 0.0 1.5 12 N
7th
-0.8 5.7 87 2.6 0.0 1012.6 f  5.3 1.0 17 SE
8th
4.1 10.2 91 8.3 0.0 996.1 f  2.8 2.6 19 SSW
9th
8.0 11.2 87 6.3 1.2 996.5 fs 2.3 3.4 20 SSW
10th
3.6 8.5 53 -0.9 0.2 999.2 st 0.3 4.2 22 SSW
11th
3.1 4.8 60 -2.8 0.1 1019.8 r  0.3 2.8 21 N
12th
-2.3 5.7 39 -7.3 3.2 1030.7 st 0.0 0.8 13 ESE
13th
-2.8 5.1 37 -8.6 6.2 1027.5 f  0.0 1.4 18 ESE
14th
-1.3 6.9 59 -1.1 0.2 1020.3 fs 0.5 0.9 12 SE
15th
2.3 9.4 59 1.3 6.2 1021.8 st 0.0 1.0 11 NNW
16th
0.9 2.8 78 -1.0 0.0 1025.2 st 0.0 1.6 11 N
17th
1.4 4.6 69 -0.9 0.1 1023.9 f  0.0 2.1 13 ENE
18th
1.3 6.6 63 -1.2 1.7 1018.6 fs 0.0 3.1 17 ENE
19th
2.1 8.8 57 0.2 3.8 1013.7 f  0.0 2.5 13 ENE
20th
3.6 6.2 70 0.5 0.0 1011.3 st 0.0 1.9 12 ENE
21st
3.1 5.2 58 -2.8 0.0 1011.3 st 0.0 2.0 14 ENE
22nd
0.7 8.3 48 -3.7 2.3 1011.9 st 0.0 1.2 14 ENE
23rd
-1.9 11.4 35 -3.9 6.2 1006.8 f  0.0 1.3 19 ESE
24th
5.8 12.9 80 9.0 0.7 992.7 rs 3.3 2.8 18 SSW
25th
9.1 12.6 74 7.7 0.3 1003.7 st 2.8 5.7 25 SSW
26th
10.5 13.9 88 11.2 0.0 1005.9 st 3.0 5.0 21 SSW
27th
10.7 12.1 80 8.2 0.0 997.1 rs 1.8 8.2 31 SSW
28th
8.1 12.4 60 4.7 3.8 999.1 st 0.0 7.2 32 SSW
29th
7.1 12.9 65 5.4 2.7 1007.2 st 4.1 3.3 22 SSW
30th
8.8 12.4 81 8.9 0.2 999.1 rs 7.9 7.1 24 SSW
31st
10.1 13.4 78 8.7 1.5 1007.3 rs 4.6 6.3 22 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 45-55% 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: f = falling, st = steady, r = rising; q = quickly, s = slowly

'WIND ROSE' PLOT FOR THE MONTH
Feb 2006 wind rose
The 'petals' represent wind direction and the length represents frequency, i.e. in this case winds from the SSW were the most common, followed by the ESE then ENE and N.

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

This data excludes 'calm' readings.