Daily Report for 27th October 2023

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.8 °C (-0.8) 05:08 10.5 °C (+1.8) 14.1 °C (+6.5), 2021 1.8 °C (-5.8), 2012
Maximum Temperature 13.7 °C (+0.4) 14:04 17.2 °C (+2.2) 19.8 °C (+6.5), 2022 6.6 °C (-6.7), 2018
Mean Temperature 10.0 °C (-0.2) 13.7 °C (+2.0) 16.2 °C, 2022 4.3 °C, 2012
Minimum Humidity 79% 16:11 73% 81%, 2011 56%, 2013
Maximum Humidity 98% 07:32 94% 98%, 2023 88%, 2016
Mean Humidity 91% 86% 91%, 2023 78%, 2016
Minimum Pressure 990 hPa 03:58 1006 hPa 1030 hPa, 2016 990 hPa, 2013
Maximum Pressure 992 hPa 19:27 1014 hPa 1035 hPa, 2017 992 hPa, 2023
Mean Pressure 991 hPa 1010 hPa 1032 hPa, 2017 991 hPa, 2023
Mean Wind Speed 2.8 mph (-1.3) 4.6 mph (+0.5) 9.0 mph, 2021 2.2 mph, 2019
Maximum Wind Speed 12.3 mph 13:47 12.7 mph 20.6 mph, 2013 7.7 mph, 2017
Maximum Gust 17.3 mph 13:48 19.6 mph 33.9 mph, 2013 11.2 mph, 2009
Mean Wind Direction WSW
Rainfall 0.2 mm 82.1 mm (145%) 8.9 mm, 2013
Maximum Hourly Rain 0.2 mm 3.3 mm, 2013
Maximum 10-min Rain 0.2 mm 1.2 mm, 2013
Maximum Rain Rate n/a 18, 2020
Minimum Dew Point 6.2 °C 05:08 9.0 °C 11.5 °C, 2022 -1.3 °C, 2012
Maximum Dew Point 10.7 °C 14:39 13.6 °C 16.3 °C, 2022 2.6 °C, 2012
Mean Dew Point 8.6 °C 11.3 °C 14.3 °C, 2022 0.9 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 6.8 °C 05:10 11.0 °C 14.1 °C, 2021 1.8 °C, 2012
Day Maximum (09-21) 13.7 °C 14:05 17.2 °C 19.8 °C, 2022 6.6 °C, 2018
Max 10m Temp Rise 0.4 °C 07:06 0.4 °C 0.8 °C, 2009 0.2 °C, 2011
Max 1hr Temp Rise 2.1 °C 13:30 1.6 °C 2.2 °C, 2009 0.8 °C, 2011
Max 1hr Hum Rise 4% 15:13 6% 11%, 2013 3%, 2015
Max 10m Temp Fall 0.4 °C 15:11 0.5 °C 1.0 °C, 2009 0.2 °C, 2014
Max 1hr Temp Fall 1.1 °C 15:33 1.7 °C 2.6 °C, 2009 0.8 °C, 2015
Max 1hr Hum Fall 11% 13:37 8% 13%, 2016 3%, 2018
Max 10m Wind Speed 8.4 mph 15:03 9.5 mph 15.3 mph, 2013 5.1 mph, 2009
Minimum Feels-like 6.4 °C 05:38 11.1 °C 16.2 °C, 2021 -5.1 °C, 2012
Maximum Feels-like 15.2 °C 13:58 20.4 °C 24.5 °C, 2022 5.8 °C, 2012
Mean Feels-like 10.6 °C 15.7 °C 19.8 °C, 2022 0.7 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.9 °C (+1.1) 6.7 °C (+0.5) 7.2 °C (+1.4), 2022 2.6 °C (-3.2), 2011
Humidity Range 19% 21% 38%, 2013 11%, 2011
Pressure Range 2 hPa 8 hPa 10 hPa, 2012 2 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3 [34%]101 hrs (97%) [39%] 9.4 [105%], 2017 0 [0%], 2011
Wet Hours 169 hrs (162%) [11%] 6, 2020 0, 2010
Cloud Cover unknown
Events None
Comments blr
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 14.5 °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

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Wind rose