Daily Report for 3rd September 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.9 °C (+3.3) 21:36 16.9 °C (+4.2) 15.9 °C (+3.3), 2024 9.4 °C (-3.2), 2015
Maximum Temperature 23.9 °C (+2.9) 13:25 24.2 °C (+3.2) 25.7 °C (+4.7), 2023 15.9 °C (-5.1), 2015
Mean Temperature 18.7 °C (+3.1) 19.8 °C (+3.7) 19.4 °C, 2022 12.5 °C, 2015
Minimum Humidity 68% 13:36 71% 81%, 2020 38%, 2012
Maximum Humidity 95% 07:31 94% 97%, 2018 81%, 2019
Mean Humidity 85% 85% 86%, 2020 69%, 2009
Minimum Pressure 1012 hPa 05:29 1012 hPa 1027 hPa, 2023 993 hPa, 2009
Maximum Pressure 1017 hPa 22:43 1017 hPa 1029 hPa, 2023 1003 hPa, 2009
Mean Pressure 1014 hPa 1014 hPa 1028 hPa, 2023 998 hPa, 2009
Mean Wind Speed 2.1 mph (-1.8) 2.4 mph (-1.5) 9.8 mph, 2009 1.0 mph, 2018
Maximum Wind Speed 8.7 mph 12:49 9.5 mph 23.9 mph, 2016 5.6 mph, 2012
Maximum Gust 15.6 mph 13:37 14.2 mph 33.9 mph, 2016 8.1 mph, 2012
Mean Wind Direction W
Rainfall 0.7 mm 0.7 mm (14%) 5.5 mm, 2016
Maximum Hourly Rain 0.7 mm 03:08 2.8 mm, 2016
Maximum 10-min Rain 0.5 mm 02:50 0.8 mm, 2016
Maximum Rain Rate 2.4 mm/h 02:50 7 mm/h, 2020
Minimum Dew Point 13.4 °C 20:36 15.1 °C 13.4 °C, 2024 5.8 °C, 2009
Maximum Dew Point 18.2 °C 12:31 19.3 °C 18.6 °C, 2023 10.9 °C, 2015
Mean Dew Point 16.0 °C 17.2 °C 16.0 °C, 2024 8.6 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 17.0 °C * 05:17 17.2 °C 17.0 °C, 2024 9.4 °C, 2015
Day Maximum (09-21) 23.9 °C 13:26 24.2 °C 25.7 °C, 2023 15.9 °C, 2015
Max 10m Temp Rise 0.7 °C 10:59 0.5 °C 1.8 °C, 2009 0.4 °C, 2020
Max 1hr Temp Rise 2.3 °C 12:24 1.7 °C 3.8 °C, 2013 1.4 °C, 2020
Max 1hr Hum Rise 8% 14:21 6% 18%, 2017 4%, 2011
Max 10m Temp Fall 0.7 °C 13:58 0.4 °C 1.4 °C, 2009 0.3 °C, 2019
Max 1hr Temp Fall 1.7 °C 14:23 1.3 °C 3.0 °C, 2012 1.2 °C, 2019
Max 1hr Hum Fall 10% 11:42 7% 26%, 2018 5%, 2021
Max 10m Wind Speed 6.2 mph 12:58 6.6 mph 18.5 mph, 2016 3.9 mph, 2018
Minimum Feels-like 19.1 °C 21:36 21.0 °C 19.1 °C, 2024 7.4 °C, 2015
Maximum Feels-like 29.8 °C 13:23 30.8 °C 32.0 °C, 2023 17.4 °C, 2015
Mean Feels-like 23.3 °C 25.3 °C 23.8 °C, 2023 13.0 °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 8.0 °C (-0.4) 7.3 °C (-1.0) 13.0 °C (+4.6), 2023 5.7 °C (-2.7), 2020
Humidity Range 27% 23% 56%, 2012 10%, 2020
Pressure Range 5 hPa 5 hPa 10 hPa, 2009 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4.5 [37%]14 hrs (86%) [37%] 11 [90%], 2023 0 [0%], 2017
Wet Hours 1
[Mean rain rate: 0.7 mm/h]
1 hrs (24%) [1.4%] 7, 2016 0, 2010
Cloud Cover unknown
Events None
Comments rn
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 21.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 3rd September 2024.
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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