Daily Report for 16th August 2024

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 14.4 °C (+0.3) 23:46 15.9 °C (+1.5) 17.3 °C (+3.2), 2022 10.5 °C (-3.6), 2015
Maximum Temperature 24.5 °C (+2.1) 17:42 25.2 °C (+2.3) 25.9 °C (+3.5), 2023 17.8 °C (-4.6), 2021
Mean Temperature 19.2 °C (+1.2) 20.3 °C (+1.9) 20.2 °C, 2020 15.2 °C, 2015
Minimum Humidity 45% 17:44 59% 70%, 2013 41%, 2014
Maximum Humidity 95% 01:06 91% 96%, 2020 77%, 2017
Mean Humidity 75% 76% 86%, 2020 59%, 2017
Minimum Pressure 1014 hPa 19:22 1012 hPa 1020 hPa, 2023 1004 hPa, 2019
Maximum Pressure 1018 hPa 09:46 1017 hPa 1023 hPa, 2021 1011 hPa, 2022
Mean Pressure 1016 hPa 1015 hPa 1022 hPa, 2023 1009 hPa, 2022
Mean Wind Speed 1.4 mph (-2.6) 3.3 mph (-0.7) 6.4 mph, 2019 1.0 mph, 2015
Maximum Wind Speed 6.7 mph 16:33 10.9 mph 18.5 mph, 2019 6.7 mph, 2024
Maximum Gust 11.4 mph 02:31 16.5 mph 28.8 mph, 2019 11.2 mph, 2015
Mean Wind Direction NW
Rainfall 1.9 mm 13.0 mm (47%) 15.2 mm, 2018
Maximum Hourly Rain 1.4 mm 03:31 10.0 mm, 2020
Maximum 10-min Rain 0.7 mm 03:17 3.0 mm, 2020
Maximum Rain Rate 4.8 mm/h 03:17 100 mm/h, 2020
Minimum Dew Point 11.4 °C 21:57 12.5 °C 15.7 °C, 2022 5.6 °C, 2014
Maximum Dew Point 18.4 °C 00:17 18.6 °C 19.0 °C, 2020 10.9 °C, 2014
Mean Dew Point 14.2 °C 15.7 °C 17.6 °C, 2020 8.5 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 14.7 °C * 06:37 16.1 °C 18.6 °C, 2020 10.5 °C, 2015
Day Maximum (09-21) 24.5 °C 17:43 25.2 °C 25.9 °C, 2023 17.8 °C, 2021
Max 10m Temp Rise 0.7 °C 12:10 0.6 °C 0.7 °C, 2012 0.3 °C, 2018
Max 1hr Temp Rise 2.7 °C 12:49 2.3 °C 2.7 °C, 2017 1.2 °C, 2011
Max 1hr Hum Rise 14% 20:48 9% 16%, 2023 5%, 2010
Max 10m Temp Fall 0.9 °C 20:17 0.5 °C 0.9 °C, 2009 0.3 °C, 2013
Max 1hr Temp Fall 4.4 °C 21:00 2.1 °C 4.4 °C, 2024 1.3 °C, 2013
Max 1hr Hum Fall 11% 13:42 10% 20%, 2018 6%, 2013
Max 10m Wind Speed 5.7 mph 00:27 7.9 mph 13.4 mph, 2019 5.2 mph, 2015
Minimum Feels-like 16.4 °C 23:46 18.8 °C 21.8 °C, 2022 10.5 °C, 2015
Maximum Feels-like 27.5 °C 17:07 31.0 °C 30.7 °C, 2023 20.7 °C, 2014
Mean Feels-like 22.8 °C 24.9 °C 25.9 °C, 2020 16.0 °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 10.1 °C (+1.8) 9.3 °C (+0.8) 12.0 °C (+3.7), 2023 4.4 °C (-3.9), 2018
Humidity Range 50% 32% 50%, 2009 15%, 2011
Pressure Range 4 hPa 5 hPa 14 hPa, 2019 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 11 [83%]95 hrs (97%) [44%] 11 [83%], 2016 0 [0%], 2019
Wet Hours 3
[Mean rain rate: 0.6 mm/h]
12 hrs (61%) [3.1%] 10, 2019 0, 2009
Cloud Cover unknown
Events None
Comments o.night 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 16th August 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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