Weather Data - August 2009

August 2009
Times indicate the end of a measurement period (BST)
Maximum Temperature 31.1 ēC 09-Aug-09    1:15 PM
Minimum Temperature 8.1 ēC 08-Aug-09    5:30 AM
Mean (15 min) 17.4 ēC 0.7 from average
Mean (Max Min) 18.6 ēC 1.9 from average  (calculated from 0901 to 0900 GMT data)
Mean Max 24.2 ēC 3.8 from average  (calculated from 0901 to 0900 GMT data)
Mean Min 12.9 ēC 0.9 from average  (calculated from 0901 to 0900 GMT data)
Lowest Max 17.9 ēC 03-Aug-09
Highest Min 17.9 ēC 20-Aug-09
Air Frosts 0 0 hours of Frost duration
Maximum Station Pressure 1023 hPa 07-Aug-09    8:45 PM
Minimum Station Pressure 1004 hPa 31-Aug-09    7:15 PM
Mean 1015.9 hPa
Mean of 09Z values 1015.4 hPa
Rainfall 32.1 mm 40.1% of average
Wettest 24hr 15.9 mm 04-Aug-09 11:45 AM
Wettest Calendar Day 10.8 mm 03-Aug-09 (calculated from 0901 to 0900 following day)
Rain Days ( > 0.3mm) 7 days (calculated from 0901 to 0900 GMT data)
Wet Days (>1.0mm) 4 days (calculated from 0901 to 0900 GMT data)
Wet Days (>5.0mm) 2 days (calculated from 0901 to 0900 GMT data)
Max 15min accum 1.2 mm 01-Aug-09    5:30 AM
Rain Duration 21.5 hours
Longest Dry period 12.05 days #VALUE! #VALUE! 289.25 (hours)
Longest Wet period (>0.3mm / 15 mins) 2.00 hours 04-Aug-09 11:00 AM
Sunshine Hours (>30klux) 167.75 hours 83.9% of average
Max Sunshine 9.75 hours 07-Aug-09 (calculated from 0901 to 0900 following day)
Sunshine Hours (>50%) 163 hours 81.5% of average
Max Sunshine 9.75 hours 07-Aug-09 (calculated from 0901 to 0900 following day)
Brightest Calendar Day 30.4 klux 06-Aug-09 (calculated from 0901 to 0900 following day)
Sunless Days 4 days (calculated from 0901 to 0900 GMT data)
Maximum Brightness (klux) 119 klux 10-Aug-09    1:00 PM
Average Wind Speed #DIV/0! knots #DIV/0! mph
Maximum Wind Speed 0 knots #N/A #N/A 0.0 mph
Days with wind from: (calculated from 0901 to 0900 GMT data)
Calm 31
N 0
NE 0
E 0
SE 0
S 0
SW 0
W 0
NW 0
Average RH (at 09Z) 79.1

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