Daily Report for 14th October 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.5 °C (+0.3) 9.1 °C (-0.5) 13.8 °C (+4.6), 2017 2.7 °C (-6.5), 2012
Maximum Temperature 14.1 °C (-1.0) 16.0 °C (+0.2) 19.9 °C (+4.8), 2018 10.8 °C (-4.3), 2013
Mean Temperature 11.0 °C (-0.3) 12.3 °C (-0.1) 16.9 °C, 2017 7.4 °C, 2012
Minimum Humidity 65% 64% 94%, 2014 47%, 2011
Maximum Humidity 90% 91% 97%, 2014 82%, 2016
Mean Humidity 80% 80% 96%, 2014 67%, 2011
Minimum Pressure 1030 hPa 1014 hPa 1030 hPa, 2009 999 hPa, 2014
Maximum Pressure 1033 hPa 1020 hPa 1033 hPa, 2009 1004 hPa, 2012
Mean Pressure 1032 hPa 1017 hPa 1032 hPa, 2009 1002 hPa, 2012
Mean Wind Speed 0.8 mph (-3.3) 3.6 mph (-0.5) 5.1 mph, 2017 0.8 mph, 2009
Maximum Wind Speed 4.7 mph 10.3 mph 13.7 mph, 2019 4.7 mph, 2009
Maximum Gust 5.8 mph 15.2 mph 19.6 mph, 2018 5.8 mph, 2009
Mean Wind Direction SE
Rainfall 0.3 mm 18.9 mm (64%) 12.5 mm, 2018
Maximum Hourly Rain 0.3 mm 4.6 mm, 2018
Maximum 10-min Rain n/a 1.3, 2013
Maximum Rain Rate n/a 18, 2013
Minimum Dew Point 3.3 °C 5.9 °C 12.2 °C, 2017 2.0 °C, 2012
Maximum Dew Point 9.4 °C 11.6 °C 16.1 °C, 2018 7.4 °C, 2012
Mean Dew Point 7.7 °C 8.8 °C 14.1 °C, 2017 3.9 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 9.9 °C * 9.7 °C 15.6 °C, 2017 2.7 °C, 2012
Day Maximum (09-21) 14.1 °C 15.6 °C 19.6 °C, 2017 10.8 °C, 2013
Max 10m Temp Rise n/a 0.0 °C 0.7, 2012 0.2, 2010
Max 1hr Temp Rise n/a 0.0 °C 2.9, 2012 0.3, 2018
Max 1hr Hum Rise n/a 0% 10, 2017 1, 2014
Max 10m Temp Fall n/a 0.0 °C 0.4, 2012 0.1, 2014
Max 1hr Temp Fall n/a 0.0 °C 1.4, 2017 0.5, 2014
Max 1hr Hum Fall n/a 0% 14, 2012 1, 2014
Max 10m Wind Speed n/a 5.4 mph 10.3, 2019 5, 2010
Minimum Feels-like 0.0 °C 00:00 6.6 °C 16.2 °C, 2017 0.0 °C, 2009
Maximum Feels-like 0.0 °C 00:00 12.7 °C 24.6 °C, 2018 0.0 °C, 2009
Mean Feels-like 0.0 °C 10.1 °C 20.4 °C, 2017 0.0 °C, 2009
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.6 °C (-1.3) 6.9 °C (+0.7) 10.2 °C (+4.3), 2018 1.7 °C (-4.2), 2010
Humidity Range 25% 28% 39%, 2011 3%, 2014
Pressure Range 3 hPa 7 hPa 12 hPa, 2019 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.2 [2%]42 hrs (82%) [30%] 9 [93%], 2011 0 [0%], 2010
Wet Hours 120 hrs (89%) [5.9%] 12, 2018 0, 2010
Cloud Cover not available
Events None
Comments 07-08 SLight Rain
Extra Comments
Issues MISSING DATA: 3rd - 6th, 11th - 21st. Figures obtained from local PWSs, Hampstead and METARs, with wind data obtained by regressional analysis from London AP METARs.
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Times of extremes are computed using the midpoint of the longest continuous period at that extreme value.
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs, Wet hrs, Cloud cover and Events are based on manual equipment/observations (entered with a delay of 1-10 days); their reliablity is questionable and they are provided for interest only.
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Daily Graph of Conditions

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