Daily Report for 16th November 2023

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.6 °C (-0.8) 04:35 6.3 °C (+0.2) 11.8 °C (+6.5), 2015 0.1 °C (-5.2), 2010
Maximum Temperature 7.6 °C (-2.9) 21:01 11.5 °C (+0.3) 14.0 °C (+3.5), 2015 6.8 °C (-3.7), 2019
Mean Temperature 6.3 °C (-1.8) 8.8 °C (+0.2) 13.0 °C, 2015 3.8 °C, 2010
Minimum Humidity 89% 19:45 80% 96%, 2014 61%, 2009
Maximum Humidity 96% 05:44 96% 98%, 2009 81%, 2016
Mean Humidity 92% 90% 97%, 2010 76%, 2015
Minimum Pressure 1011 hPa 09:48 991 hPa 1028 hPa, 2013 976 hPa, 2022
Maximum Pressure 1019 hPa 23:31 1003 hPa 1033 hPa, 2013 995 hPa, 2022
Mean Pressure 1015 hPa 997 hPa 1031 hPa, 2013 989 hPa, 2022
Mean Wind Speed 2.5 mph (-2.1) 5.3 mph (+0.7) 9.0 mph, 2016 1.3 mph, 2010
Maximum Wind Speed 9.3 mph 21:17 14.9 mph 23.5 mph, 2016 7.1 mph, 2013
Maximum Gust 13.8 mph 19:27 23.8 mph 35.5 mph, 2016 9.8 mph, 2013
Mean Wind Direction N
Rainfall 0.0 mm 57.6 mm (161%) 13.9 mm, 2022
Maximum Hourly Rain n/a 5.1, 2022
Maximum 10-min Rain n/a 1.9, 2022
Maximum Rain Rate n/a 30, 2022
Minimum Dew Point 3.7 °C 00:50 5.0 °C 8.1 °C, 2014 -0.2 °C, 2010
Maximum Dew Point 6.1 °C 17:48 9.4 °C 12.0 °C, 2015 4.5 °C, 2019
Mean Dew Point 5.1 °C 7.2 °C 9.1 °C, 2018 3.3 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 4.6 °C 04:37 6.8 °C 12.9 °C, 2015 0.1 °C, 2010
Day Maximum (09-21) 7.6 °C 20:46 11.4 °C 13.9 °C, 2016 6.8 °C, 2019
Max 10m Temp Rise 0.3 °C 05:35 0.4 °C 0.8 °C, 2009 0.2 °C, 2011
Max 1hr Temp Rise 0.9 °C 06:10 1.4 °C 2.2 °C, 2021 0.2 °C, 2018
Max 1hr Hum Rise 2% 01:04 5% 9%, 2017 1%, 2014
Max 10m Temp Fall 0.3 °C 00:30 0.4 °C 1.0 °C, 2017 0.1 °C, 2012
Max 1hr Temp Fall 0.9 °C 22:47 1.3 °C 2.3 °C, 2017 0.2 °C, 2012
Max 1hr Hum Fall 2% 09:21 7% 16%, 2009 1%, 2012
Max 10m Wind Speed 5.8 mph 21:30 10.8 mph 17.2 mph, 2016 5.3 mph, 2021
Minimum Feels-like 2.5 °C 08:43 3.1 °C 11.8 °C, 2015 -1.5 °C, 2013
Maximum Feels-like 7.5 °C 21:14 12.5 °C 16.3 °C, 2015 6.8 °C, 2019
Mean Feels-like 5.2 °C 7.9 °C 13.8 °C, 2015 3.4 °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 3.0 °C (-2.1) 5.2 °C (+0.1) 8.9 °C (+3.8), 2017 2.2 °C (-2.9), 2015
Humidity Range 7% 16% 37%, 2009 1%, 2014
Pressure Range 8 hPa 12 hPa 19 hPa, 2022 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]44 hrs (95%) [33%] 5.5 [70%], 2013 0 [0%], 2012
Wet Hours 058 hrs (173%) [15%] 9, 2022 0, 2010
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 8.9 °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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Wind rose