Daily Report for 1st November 2021

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.9 °C (-1.1) 23:52 5.9 °C (-1.0) 13.1 °C (+6.1), 2014 4.1 °C (-2.9), 2012
Maximum Temperature 12.6 °C (+0.0) 12:18 12.6 °C (+0.2) 16.9 °C (+4.3), 2014 11.4 °C (-1.2), 2012
Mean Temperature 9.7 °C (-0.6) 9.7 °C (-0.4) 15.3 °C, 2014 7.4 °C, 2012
Minimum Humidity 69% 12:14 69% 90%, 2015 51%, 2014
Maximum Humidity 91% 23:53 91% 98%, 2009 81%, 2016
Mean Humidity 80% 80% 94%, 2015 76%, 2014
Minimum Pressure 992 hPa 02:49 992 hPa 1027 hPa, 2015 975 hPa, 2012
Maximum Pressure 998 hPa 23:43 998 hPa 1031 hPa, 2015 986 hPa, 2012
Mean Pressure 995 hPa 995 hPa 1029 hPa, 2015 979 hPa, 2012
Mean Wind Speed 6.7 mph (+2.1) 6.7 mph (+2.1) 10.8 mph, 2022 0.5 mph, 2015
Maximum Wind Speed 15.7 mph 12:47 15.7 mph 26.8 mph, 2022 4.0 mph, 2015
Maximum Gust 25.1 mph 13:27 25.1 mph 43.8 mph, 2022 5.4 mph, 2015
Mean Wind Direction WSW
Rainfall 1.0 mm 1.0 mm (45%) 13.7 mm, 2009
Maximum Hourly Rain 1.0 mm 13:15 5.7 mm, 2012
Maximum 10-min Rain 0.8 mm 13:15 3.3 mm, 2018
Maximum Rain Rate 7 mm/h 13:09 53 mm/h, 2018
Minimum Dew Point 4.4 °C 23:45 4.4 °C 10.1 °C, 2013 0.9 °C, 2012
Maximum Dew Point 8.3 °C 12:58 8.3 °C 15.8 °C, 2009 8.3 °C, 2021
Mean Dew Point 6.3 °C 6.3 °C 12.2 °C, 2020 4.6 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 9.0 °C * 07:44 9.0 °C 15.8 °C, 2014 6.2 °C, 2015
Day Maximum (09-21) 12.6 °C 12:18 12.6 °C 16.9 °C, 2014 9.3 °C, 2012
Max 10m Temp Rise 0.4 °C 10:31 0.4 °C 0.5 °C, 2009 0.2 °C, 2018
Max 1hr Temp Rise 1.2 °C 10:38 1.2 °C 1.8 °C, 2020 0.4 °C, 2024
Max 1hr Hum Rise 13% 13:29 13% 14%, 2025 1%, 2016
Max 10m Temp Fall 0.5 °C 12:53 0.5 °C 1.2 °C, 2022 0.2 °C, 2010
Max 1hr Temp Fall 1.9 °C 13:27 1.9 °C 3.1 °C, 2022 0.4 °C, 2019
Max 1hr Hum Fall 6% 10:48 6% 22%, 2009 2%, 2015
Max 10m Wind Speed 13.7 mph 12:01 13.7 mph 20.7 mph, 2022 3.7 mph, 2015
Minimum Feels-like 5.3 °C 07:39 5.3 °C 13.8 °C, 2014 0.0 °C, 2012
Maximum Feels-like 12.8 °C 12:44 12.8 °C 20.8 °C, 2020 12.1 °C, 2012
Mean Feels-like 8.7 °C 8.7 °C 17.1 °C, 2014 5.2 °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 6.7 °C (+1.1) 6.7 °C (+1.2) 7.3 °C (+1.7), 2012 1.6 °C (-4.0), 2024
Humidity Range 22% 22% 42%, 2017 6%, 2015
Pressure Range 6 hPa 6 hPa 27 hPa, 2019 3 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [92%]8 hrs (263%) [93%] 8 [92%], 2021 0 [0%], 2016
Wet Hours 1
[Mean rain rate: 1.0 mm/h]		1 hrs (48%) [4.2%] 10, 2018 0, 2010
Cloud Cover Sunny with periods of Mostly Sunny
Events None
Comments lunch sh
Extra Comments rainbow
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 11.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 1st November 2021.
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 derived based on analysis of webcam observations, but may use data from our closest site, Heathrow, when needed.
Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually.
Rainfall totals may be manually adjusted after the fact to correct delayed or erroneous data.
Cloud cover and Events are manually reported, often with multi-week delays.
Data is generally reliable and accurate but should always be viewed with some quantity of salt to hand.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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Wind rose