Daily Report for 8th November 2023

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.4 °C (+0.1) 23:40 7.1 °C (+0.5) 11.3 °C (+5.0), 2022 -0.4 °C (-6.7), 2016
Maximum Temperature 12.8 °C (+1.4) 13:35 12.5 °C (+0.7) 16.0 °C (+4.6), 2015 5.5 °C (-5.9), 2016
Mean Temperature 9.2 °C (+0.8) 9.5 °C (+0.6) 13.3 °C, 2015 3.2 °C, 2016
Minimum Humidity 89% 17:22 80% 91%, 2011 60%, 2018
Maximum Humidity 96% 13:16 96% 98%, 2009 80%, 2016
Mean Humidity 93% 90% 95%, 2011 74%, 2016
Minimum Pressure 1002 hPa 13:15 980 hPa 1024 hPa, 2021 966 hPa, 2010
Maximum Pressure 1012 hPa 00:02 997 hPa 1026 hPa, 2017 992 hPa, 2010
Mean Pressure 1005 hPa 989 hPa 1024 hPa, 2021 979 hPa, 2010
Mean Wind Speed 5.0 mph (+0.4) 5.9 mph (+1.3) 9.7 mph, 2022 0.7 mph, 2020
Maximum Wind Speed 18.8 mph 09:52 16.6 mph 24.2 mph, 2018 5.0 mph, 2020
Maximum Gust 27.6 mph 10:14 26.6 mph 34.6 mph, 2022 8.0 mph, 2020
Mean Wind Direction W
Rainfall 3.6 mm 30.5 mm (171%) 16.3 mm, 2014
Maximum Hourly Rain 1.7 mm 13:50 11.5 mm, 2014
Maximum 10-min Rain 1.0 mm 13:43 6.6 mm, 2014
Maximum Rain Rate 7 mm/h 13:37 90 mm/h, 2014
Minimum Dew Point 5.4 °C 23:35 5.6 °C 9.3 °C, 2022 -3.8 °C, 2016
Maximum Dew Point 12.2 °C 13:35 10.3 °C 14.1 °C, 2015 1.0 °C, 2016
Mean Dew Point 8.1 °C 7.9 °C 11.6 °C, 2015 -1.1 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 6.7 °C * 02:37 7.5 °C 11.9 °C, 2022 -0.4 °C, 2016
Day Maximum (09-21) 12.8 °C 13:36 12.4 °C 16.0 °C, 2015 5.5 °C, 2016
Max 10m Temp Rise 0.3 °C 05:46 0.4 °C 0.8 °C, 2014 0.1 °C, 2011
Max 1hr Temp Rise 1.0 °C 06:30 1.5 °C 2.6 °C, 2013 0.4 °C, 2011
Max 1hr Hum Rise 3% 18:19 5% 10%, 2014 1%, 2015
Max 10m Temp Fall 0.4 °C 13:48 0.4 °C 0.9 °C, 2014 0.2 °C, 2016
Max 1hr Temp Fall 1.2 °C 18:00 1.3 °C 2.2 °C, 2022 0.4 °C, 2020
Max 1hr Hum Fall 3% 15:18 6% 9%, 2012 2%, 2015
Max 10m Wind Speed 12.9 mph 11:14 12.0 mph 15.4 mph, 2022 0.0 mph, 2020
Minimum Feels-like 3.3 °C 23:02 3.8 °C 12.4 °C, 2022 -5.5 °C, 2016
Maximum Feels-like 15.2 °C 13:35 13.9 °C 19.4 °C, 2015 5.5 °C, 2016
Mean Feels-like 9.0 °C 8.8 °C 15.4 °C, 2015 1.4 °C, 2016
Air-frost Hrs 0 hrs 0 hrs 1 hrs, 2016 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.4 °C (+1.3) 5.5 °C (+0.2) 8.4 °C (+3.3), 2018 1.7 °C (-3.4), 2011
Humidity Range 7% 16% 32%, 2018 5%, 2015
Pressure Range 10 hPa 16 hPa 26 hPa, 2010 2 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]25 hrs (105%) [37%] 7 [85%], 2018 0 [0%], 2010
Wet Hours 5
[Mean rain rate: 0.7 mm/h]
38 hrs (226%) [20%] 5, 2011 0, 2012
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 10.0 °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 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

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