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OCTOBER 2007 daily and monthly summary

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OCTOBER 2007
November 2007

1st - 7th
A gloomy and wet start to the month with LP to the SW and fronts crossing the southern UK from SSW to NNE on the 1st. Becoming brighter and milder as HP again ridges across the SE. Fog 7th am.
8th - 15th
A dull day on the 8th precedes a LP that brings moderate and occasionally heavy rain for some hours through the middle of the day on the 9th. More rain during the early hours of the 10th. A foggy start to the 11th, 13th, 14th & 15th.
16th - 23rd
A band of rain crosses the UK on the 16th, heavy in the midlands but fizzling out by the time it reaches the SE overnight. Much brighter and fresher weather with long sunny periods follows with HP over the UK and Ireland. Cloudy on 20th as HP starts to move eastward towards southern Scandinavia. Sunny day on 21st but fog on morning of 22nd before turning cloudy again and another reverse as the 23rd sees unbroken sunshine.
24th - 31st
LP near Iceland and HP extending weakly from the Azores to stronger HP over the Baltic States and Russia. Rather dismal with Anticyclonic gloom from the 24th - 26th. On the 27th more mobile SW'lies cover the UK, with complex low pressure to the north and west, and a high over France. Frontal light rain during morning and afternoon of 28th. A sunny end to the month.

OCTOBER 2007 MONTHLY SUMMARY
ACTUAL TEMPERATURE
 AVERAGE
 Daily Maximum
14.7
 ºC ( -0.3 )*
 Daily Minimum
7.4
 ºC ( -0.6 )*
 Daily Mean
10.5
 ºC  
 EXTREMES
 High Maximum
18.9
 ºC (14th)
 Low Minimum
-0.9
 ºC (23rd)
 Low Daytime Maximum
9.2
 ºC (25th)
 High Night-time Minimum
13.2
 ºC (13th)
 
   
 Days with Air Frost
2
   
 Days with max > 20 ºC
0
   
 Days with min < 5 ºC
9
   
 
PRECIPITATION
 Monthly Total
36.4
 mm ( 42% )*
 Days with measurable precip
9
 Days ( -6 )
   ...of which, days with >= 1.0 mm
5
 Days  
   ...and days with snowfall observed
0
 Days  
 Days with Hail
0
 Days  
 Days with Thunder
0
 Days  
 RAIN RATE & EXTREMES
 High Rain Rate
28.2
 mm/hr (9th)
 High Rain Total in 1 day
14.0
 mm (9th)
 High Rain Total in 1 hour
5.9
 mm (9th, 14.30)
 EVAPO-TRANSPIRATION
 Total for month
26.1
 mm  
 High Total for 1 day
1.6
 mm (4th)
APPARENT TEMPERATURE
 Low Wind Chill
-0.9
 ºC (23rd)
 DAVIS HEAT INDICES THW & THSW
 Low Temp/Hum/Wind Index
-1.1
 ºC (23rd)
 High Temp/Hum/Wind Index
18.6
 ºC (14th)
 High Temp/Hum/Sun/Wind Index
24.1
 ºC (  3rd)
 
DEWPOINT & HUMIDITY
 High Dewpoint
13.7
 ºC (3rd & 12th/13th)
 Low Dewpoint
-2.7
 ºC (23rd)
 Average Dewpoint at 14h
8.6
 ºC  
 Low Relative Humidity
47
 % (18th)
 Average RH at 14h
70
 %  
WIND SPEED & DIRECTION
 Monthly Average
0.9
 mph  
 Windiest day (Average 00-24h)
3.2
 mph (16th)
 Highest Gust
22.0
 mph (28th)
 Dominant Direction
SW
 (20%)
 
BAROMETER
 Monthly Mean
1022.9
 hPa  
 High Barometer
1036.6
 hPa (20th)
 Low Barometer
1009.4
 hPa (17th)
SUNSHINE
 Max Sensor Exposure to direct sun
7
 hours/day (9-10 possible)
 Calculated Monthly Sunshine Hours
76.9
 hours  
 Estimated Actual Hours (approx)
105
 hours  
 Sunniest Day Measured
6.5
 hours (21st)
 Days with no recorded sunshine
8
 Days  
 
FOG
 Number of Days with Fog
7
 Days  
NEW RECORDS SET THIS MONTH
 
* Compared to average since 1984
‡ 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 only 75% of total possible sunshine exposure this month. 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 OCTOBER 2007
 
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
11.4 13.1 92 10.9 0.0 1020.8 st 12.4 0.6 8 ESE
2nd
11.8 14.7 91 12.9 0.0 1018.9 fs 0.5 0.1 6 N
3rd
13.1 18.4 72 12.2 2.7 1016.6 fs 0.3 0.4 7 SSW
4th
9.2 18.4 57 9.8 4.8 1020.6 st 0.0 0.6 10 SW
5th
5.6 18.4 56 9.0 4.8 1023.6 fs 0.0 0.4 8 WNW
6th
10.1 17.4 58 8.8 3.7 1021.7 fs 0.0 0.5 10 WNW
7th
6.8 17.2 69 10.8 2.3 1020.6 fs 0.0 0.2 7 N
8th
10.6 14.9 60 7.1 0.0 1025.3 rs 0.0 0.3 6 SW
9th
8.5 14.8 91 12.5 0.2 1018.9 f 14.0 1.0 11 SW
10th
10.1 14.1 88 11.7 0.5 1025.2 rs 2.0 0.6 12 N
11th
5.2 16.2 66 9.9 6.2 1026.7 f 0.3 0.5 8 SSW
12th
9.9 17.0 86 13.6 0.0 1025.3 st 0.0 0.2 6 SW
13th
13.2 17.1 73 12.1 0.7 1024.4 fs 0.0 0.3 6 SE
14th
7.9 18.9 61 11.2 4.8 1018.3 f 0.0 0.3 7 SE
15th
8.5 16.5 65 9.5 2.0 1013.1 fs 0.0 1.8 14 SSW
16th
12.9 16.7 71 11.4 1.0 1012.8 fs 0.3 3.2 16 SSW
17th
9.8 14.4 58 5.4 4.2 1020.2 r 1.5 2.5 21 N
18th
4.9 13.7 48 2.4 6.5 1033.2 st 0.0 0.6 10 N
19th
0.8 14.5 54 3.9 5.2 1034.4 fs 0.0 0.2 8 NNW
20th
0.8 12.6 63 5.6 1.2 1035.2 fs 0.0 0.1 5 SE
21st
-0.4 14.8 52 4.5 6.5 1028.5 f 0.0 0.1 5 N
22nd
0.5 10.7 84 7.6 0.3 1023.1 fs 0.0 0.1 7 SE
23rd
-0.9 12.3 58 3.5 6.2 1024.7 st 0.0 0.5 11 SE
24th
5.4 10.4 74 5.8 0.0 1024.1 fs 0.0 0.8 12 SSE
25th
8.2 9.2 84 6.5 0.0 1022.0 fs 0.0 0.2 8 SW
26th
8.4 10.6 81 7.4 0.0 1021.2 st 0.0 0.1 5 SSW
27th
7.3 15.6 70 9.2 1.8 1024.7 fs 0.0 2.1 17 SSW
28th
12.0 13.7 89 11.9 0.0 1013.8 f 5.1 4.8 22 SW
29th
8.5 13.1 68 6.6 4.0 1012.0 rs 0.0 1.3 13 N
30th
5.8 12.9 57 4.4 5.5 1022.4 rs 0.0 1.4 13 N
31st
3.1 13.8 72 8.8 1.8 1027.9 fs 0.0 0.8 10 SW
                     
‡ 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 approx 75% 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