Weather Data - September 2009

September 2009
Times indicate the end of a measurement period (BST)
Maximum Temperature 28.9 ēC 12-Sep-09    1:30 PM
Minimum Temperature 4.8 ēC 25-Sep-09    6:45 AM
Mean (15 min) 15.5 ēC 1.3 from average
Mean (Max Min) 16.9 ēC 2.7 from average  (calculated from 0901 to 0900 GMT data)
Mean Max 23.3 ēC 5.8 from average  (calculated from 0901 to 0900 GMT data)
Mean Min 10.6 ēC 0.6 from average  (calculated from 0901 to 0900 GMT data)
Lowest Max 17.5 ēC 02-Sep-09
Highest Min 17.1 ēC 08-Sep-09
Air Frosts 0 0 hours of Frost duration
Maximum Station Pressure 1037 hPa 11-Sep-09    7:15 AM
Minimum Station Pressure 996 hPa 02-Sep-09    6:30 PM
Mean 1022.2 hPa
Mean of 09Z values 1022.9 hPa
Rainfall 0 mm 0.0% of average
Wettest 24hr 0 mm 01-Sep-09 5:30 AM
Wettest Calendar Day 0 mm 01-Sep-09 (calculated from 0901 to 0900 following day)
Rain Days ( > 0.3mm) 0 days (calculated from 0901 to 0900 GMT data)
Wet Days (>1.0mm) 0 days (calculated from 0901 to 0900 GMT data)
Wet Days (>5.0mm) 0 days (calculated from 0901 to 0900 GMT data)
Max 15min accum 0 mm 31-Aug-09    6:45 AM
Rain Duration 0 hours
Longest Dry period 32.34 days #VALUE! #VALUE! 776.25 (hours)
Longest Wet period (>0.3mm / 15 mins) 0.00 hours 31-Aug-09 5:45 AM
Sunshine Hours (>30klux) 133.50 hours 92.1% of average
Max Sunshine 9.00 hours 04-Sep-09 (calculated from 0901 to 0900 following day)
Sunshine Hours (>50%) 170 hours 117.2% of average
Max Sunshine 10.50 hours 09-Sep-09 (calculated from 0901 to 0900 following day)
Brightest Calendar Day 25.8 klux 03-Sep-09 (calculated from 0901 to 0900 following day)
Sunless Days 3 days (calculated from 0901 to 0900 GMT data)
Maximum Brightness (klux) 104 klux 07-Sep-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 30
N 0
NE 0
E 0
SE 0
S 0
SW 0
W 0
NW 0
Average RH (at 09Z) 77.3

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