Daily Report for 10th November 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.4 °C (+3.7) 22:57 6.5 °C (+0.4) 14.2 °C (+8.5), 2015 1.2 °C (-4.5), 2013
Maximum Temperature 14.4 °C (+4.0) 14:02 13.3 °C (+2.2) 16.3 °C (+5.9), 2015 7.0 °C (-3.4), 2010
Mean Temperature 12.3 °C (+3.9) 10.0 °C (+1.3) 15.0 °C, 2015 4.2 °C, 2010
Minimum Humidity 82% 14:12 76% 92%, 2009 53%, 2017
Maximum Humidity 96% 02:39 95% 98%, 2009 81%, 2016
Mean Humidity 91% 88% 96%, 2009 73%, 2010
Minimum Pressure 1020 hPa 02:49 1017 hPa 1022 hPa, 2021 987 hPa, 2010
Maximum Pressure 1026 hPa 21:40 1027 hPa 1026 hPa, 2020 996 hPa, 2018
Mean Pressure 1024 hPa 1022 hPa 1024 hPa, 2020 995 hPa, 2018
Mean Wind Speed 2.0 mph (-2.6) 2.7 mph (-1.9) 8.3 mph, 2015 1.3 mph, 2009
Maximum Wind Speed 8.2 mph 12:48 8.4 mph 20.6 mph, 2016 3.5 mph, 2009
Maximum Gust 11.4 mph 13:36 15.9 mph 27.4 mph, 2016 4.6 mph, 2009
Mean Wind Direction SW
Rainfall 1.3 mm 9.3 mm (47%) 19.1 mm, 2018
Maximum Hourly Rain 1.1 mm 02:56 5.7 mm, 2018
Maximum 10-min Rain 0.6 mm 02:56 2.2 mm, 2018
Maximum Rain Rate 36 mm/h 02:56 66 mm/h, 2018
Minimum Dew Point 8.3 °C 22:46 5.0 °C 12.1 °C, 2015 -2.6 °C, 2010
Maximum Dew Point 12.1 °C 02:56 10.7 °C 14.0 °C, 2015 2.5 °C, 2010
Mean Dew Point 10.9 °C 8.0 °C 12.9 °C, 2015 -0.3 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 11.1 °C * 04:26 7.7 °C 14.4 °C, 2015 2.4 °C, 2010
Day Maximum (09-21) 14.4 °C 14:09 13.3 °C 16.3 °C, 2015 7.0 °C, 2010
Max 10m Temp Rise 1.1 °C 02:56 0.5 °C 1.1 °C, 2020 0.2 °C, 2011
Max 1hr Temp Rise 1.0 °C 10:26 1.6 °C 1.7 °C, 2018 0.4 °C, 2015
Max 1hr Hum Rise 4% 17:48 5% 12%, 2018 1%, 2015
Max 10m Temp Fall 1.0 °C 02:24 0.6 °C 1.0 °C, 2018 0.2 °C, 2009
Max 1hr Temp Fall 1.5 °C 04:03 1.4 °C 2.9 °C, 2018 0.3 °C, 2021
Max 1hr Hum Fall 5% 11:22 7% 22%, 2017 2%, 2015
Max 10m Wind Speed 6.1 mph 10:11 3.0 mph 15.4 mph, 2016 5.5 mph, 2021
Minimum Feels-like 7.8 °C 22:33 6.2 °C 16.5 °C, 2015 -2.4 °C, 2010
Maximum Feels-like 16.5 °C 13:43 15.1 °C 19.7 °C, 2015 7.0 °C, 2010
Mean Feels-like 13.9 °C 11.1 °C 17.8 °C, 2015 1.9 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.0 °C (+0.3) 6.8 °C (+1.9) 7.0 °C (+2.3), 2013 2.1 °C (-2.6), 2015
Humidity Range 14% 18% 41%, 2017 3%, 2015
Pressure Range 6 hPa 9 hPa 22 hPa, 2013 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3 [37%]35 hrs (136%) [42%] 8.2 [101%], 2013 0 [0%], 2009
Wet Hours 1
[Mean rain rate: 1.3 mm/h]
12 hrs (55%) [4.8%] 12, 2018 0, 2010
Cloud Cover Partly Cloudy
Events None
Comments o.night rn
Extra Comments
Issues wind sensor not reporting properly - v low speeds
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 10.5 °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 are initially pulled from the official weather station at Heathrow, and later adjusted by hand to reflect local conditions based on webcam observations. Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually. Cloud cover and Events are manually reported, often with multi-week delays.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose