Daily Report for 6th September 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.3 °C (+2.9) 06:52 15.4 °C (+2.8) 19.3 °C (+6.9), 2016 5.6 °C (-6.8), 2015
Maximum Temperature 22.1 °C (+1.4) 13:33 23.4 °C (+2.5) 30.6 °C (+9.9), 2023 17.9 °C (-2.8), 2011
Mean Temperature 18.1 °C (+2.1) 19.3 °C (+2.6) 22.6 °C, 2023 12.3 °C, 2015
Minimum Humidity 69% 14:00 62% 89%, 2024 37%, 2012
Maximum Humidity 97% 07:20 93% 97%, 2022 77%, 2009
Mean Humidity 87% 79% 94%, 2024 60%, 2012
Minimum Pressure 1011 hPa 19:59 1013 hPa 1026 hPa, 2015 1000 hPa, 2010
Maximum Pressure 1015 hPa 00:38 1018 hPa 1030 hPa, 2012 1010 hPa, 2013
Mean Pressure 1013 hPa 1015 hPa 1028 hPa, 2015 1008 hPa, 2010
Mean Wind Speed 4.9 mph (+1.0) 3.9 mph (+0.0) 9.8 mph, 2011 0.4 mph, 2021
Maximum Wind Speed 15.8 mph 13:55 13.7 mph 21.0 mph, 2011 4.6 mph, 2021
Maximum Gust 25.3 mph 11:17 20.5 mph 33.9 mph, 2011 6.4 mph, 2014
Mean Wind Direction SSW
Rainfall 5.0 mm 14.1 mm (141%) 21.7 mm, 2011
Maximum Hourly Rain 2.9 mm 18:32 18.4 mm, 2011
Maximum 10-min Rain 2.9 mm 18:32 7.4 mm, 2011
Maximum Rain Rate 72 mm/h 18:28 100 mm/h, 2011
Minimum Dew Point 13.4 °C 21:37 13.2 °C 16.8 °C, 2016 4.1 °C, 2015
Maximum Dew Point 17.3 °C 09:29 17.2 °C 21.6 °C, 2023 10.1 °C, 2015
Mean Dew Point 15.7 °C 15.4 °C 19.0 °C, 2016 6.6 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.3 °C 06:51 15.4 °C 19.9 °C, 2016 5.6 °C, 2015
Day Maximum (09-21) 22.1 °C 13:33 23.4 °C 30.6 °C, 2023 16.9 °C, 2013
Max 10m Temp Rise 0.7 °C 10:25 0.6 °C 0.9 °C, 2012 0.2 °C, 2011
Max 1hr Temp Rise 1.9 °C 09:33 2.1 °C 4.7 °C, 2012 0.8 °C, 2011
Max 1hr Hum Rise 13% 15:47 10% 16%, 2025 2%, 2024
Max 10m Temp Fall 1.0 °C 15:24 0.6 °C 1.0 °C, 2022 0.3 °C, 2013
Max 1hr Temp Fall 2.3 °C 15:51 1.7 °C 3.3 °C, 2021 1.0 °C, 2018
Max 1hr Hum Fall 10% 11:13 12% 19%, 2012 5%, 2016
Max 10m Wind Speed 12.3 mph 11:18 9.6 mph 14.0 mph, 2025 2.9 mph, 2021
Minimum Feels-like 18.6 °C 23:51 18.5 °C 24.5 °C, 2016 3.9 °C, 2015
Maximum Feels-like 27.0 °C 13:30 28.3 °C 39.2 °C, 2023 18.9 °C, 2015
Mean Feels-like 22.5 °C 23.5 °C 28.6 °C, 2023 12.4 °C, 2015
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.8 °C (-1.5) 8.0 °C (-0.3) 15.2 °C (+6.9), 2023 3.9 °C (-4.4), 2016
Humidity Range 28% 31% 52%, 2012 8%, 2024
Pressure Range 4 hPa 5 hPa 20 hPa, 2016 2 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [17%]16 hrs (51%) [22%] 11 [91%], 2012 0 [0%], 2011
Wet Hours 2
[Mean rain rate: 2.5 mm/h]		8 hrs (98%) [5.6%] 5, 2011 0, 2009
Cloud Cover Mostly Cloudy with periods of Partly Cloudy
Events Thunder
Comments shs with thunder
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 20.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 6th September 2022.
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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