Daily Report for 13th August 2026

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 16.4 °C (+2.1) 06:02 14.8 °C (+0.3) 18.1 °C (+3.8), 2020 10.8 °C (-3.5), 2019
Maximum Temperature 35.8 °C (+13.1) 16:12 28.7 °C (+5.7) 35.8 °C (+13.1), 2026 18.1 °C (-4.6), 2010
Mean Temperature 26.7 °C (+7.6) 22.0 °C (+3.0) 26.7 °C, 2026 14.3 °C, 2010
Minimum Humidity 24% 16:11 32% 69%, 2015 24%, 2026
Maximum Humidity 82% 06:14 78% 94%, 2018 70%, 2017
Mean Humidity 48% 54% 87%, 2015 48%, 2026
Minimum Pressure 1020 hPa 18:49 1017 hPa 1021 hPa, 2016 1004 hPa, 2014
Maximum Pressure 1025 hPa 00:02 1022 hPa 1025 hPa, 2026 1008 hPa, 2014
Mean Pressure 1022 hPa 1019 hPa 1022 hPa, 2026 1005 hPa, 2014
Mean Wind Speed 2.1 mph (-1.9) 4.0 mph (-0.0) 7.4 mph, 2023 1.6 mph, 2017
Maximum Wind Speed 11.1 mph 17:07 12.8 mph 20.7 mph, 2025 6.8 mph, 2017
Maximum Gust 15.0 mph 15:12 19.1 mph 29.0 mph, 2016 10.0 mph, 2009
Mean Wind Direction SSE
Rainfall 0.0 mm 0.0 mm (0%) 10.4 mm, 2015
Maximum Hourly Rain n/a 5, 2015
Maximum 10-min Rain n/a 2.5, 2010
Maximum Rain Rate n/a 30, 2010
Minimum Dew Point 10.6 °C 23:50 8.8 °C 16.9 °C, 2020 4.5 °C, 2017
Maximum Dew Point 16.3 °C 08:51 14.2 °C 20.8 °C, 2020 9.6 °C, 2017
Mean Dew Point 13.4 °C 11.4 °C 18.5 °C, 2020 6.9 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 16.4 °C 06:03 14.9 °C 20.1 °C, 2020 10.8 °C, 2019
Day Maximum (09-21) 35.8 °C 16:13 28.7 °C 35.8 °C, 2026 18.1 °C, 2010
Max 10m Temp Rise 1.0 °C 07:15 0.9 °C 1.0 °C, 2009 0.4 °C, 2015
Max 1hr Temp Rise 4.1 °C 07:41 3.5 °C 4.1 °C, 2026 1.3 °C, 2009
Max 1hr Hum Rise 12% 20:47 11% 18%, 2019 5%, 2016
Max 10m Temp Fall 1.1 °C 20:13 0.8 °C 1.2 °C, 2009 0.3 °C, 2015
Max 1hr Temp Fall 4.3 °C 21:00 2.8 °C 4.3 °C, 2026 1.0 °C, 2015
Max 1hr Hum Fall 14% 10:43 14% 15%, 2013 6%, 2021
Max 10m Wind Speed 7.7 mph 17:08 9.1 mph 12.5 mph, 2023 4.4 mph, 2017
Minimum Feels-like 19.1 °C 05:51 16.2 °C 23.3 °C, 2020 11.6 °C, 2019
Maximum Feels-like 38.9 °C 14:07 31.0 °C 38.9 °C, 2026 20.4 °C, 2013
Mean Feels-like 29.7 °C 24.1 °C 29.7 °C, 2026 16.4 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Minimum PM2.5 5 16:15 3 5, 2026 0, 2021
Maximum PM2.5 12 07:00 12 12, 2026 12, 2026
Mean PM2.5 7 5 7, 2026 7, 2026
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 19.4 °C (+11.0) 14.0 °C (+5.4) 19.4 °C (+11.0), 2026 4.2 °C (-4.2), 2015
Humidity Range 58% 46% 58%, 2026 23%, 2025
Pressure Range 5 hPa 5 hPa 12 hPa, 2015 1 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 13.6 [101%]155 hrs (192%) [87%] 13.6 [101%], 2026 0 [0%], 2015
Wet Hours 00 hrs (0%) [0%] 4, 2015 0, 2012
Cloud Cover unknown
Events Maximum possible sunshine
Comments data is awaiting quality control from site operator
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 22.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 13th August 2026.
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