Daily Report for 26th May 2026


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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.8 °C (+5.5) 05:19 9.5 °C (+0.7) 15.8 °C (+5.5), 2026 5.1 °C (-5.2), 2013
Maximum Temperature 35.2 °C (+16.4) 15:33 20.1 °C (+2.6) 35.2 °C (+16.4), 2026 14.7 °C (-4.1), 2014
Mean Temperature 27.0 °C (+10.9) 15.0 °C (+1.6) 27.0 °C, 2026 11.3 °C, 2021
Minimum Humidity 23% 16:01 47% 67%, 2022 23%, 2026
Maximum Humidity 81% 05:54 85% 94%, 2009 75%, 2010
Mean Humidity 49% 67% 83%, 2014 49%, 2026
Minimum Pressure 1025 hPa 19:22 1015 hPa 1035 hPa, 2020 1005 hPa, 2011
Maximum Pressure 1031 hPa 00:20 1019 hPa 1038 hPa, 2020 1012 hPa, 2010
Mean Pressure 1028 hPa 1017 hPa 1036 hPa, 2020 1009 hPa, 2011
Mean Wind Speed 2.6 mph (-2.1) 4.0 mph (-0.7) 7.9 mph, 2009 2.3 mph, 2020
Maximum Wind Speed 10.3 mph 19:11 12.5 mph 20.1 mph, 2011 8.5 mph, 2014
Maximum Gust 18.4 mph 19:05 19.9 mph 28.8 mph, 2025 12.7 mph, 2020
Mean Wind Direction SW
Rainfall 0.0 mm 11.4 mm (30%) 14.5 mm, 2011
Maximum Hourly Rain n/a 5.2, 2011
Maximum 10-min Rain n/a 3.8, 2011
Maximum Rain Rate n/a 80, 2011
Minimum Dew Point 10.7 °C 16:01 5.6 °C 13.1 °C, 2018 0.3 °C, 2013
Maximum Dew Point 16.0 °C 23:40 11.1 °C 18.5 °C, 2018 4.0 °C, 2013
Mean Dew Point 13.8 °C 8.4 °C 15.2 °C, 2018 2.1 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.8 °C 05:20 9.7 °C 15.8 °C, 2026 5.1 °C, 2013
Day Maximum (09-21) 35.2 °C 16:12 20.1 °C 35.2 °C, 2026 14.7 °C, 2014
Max 10m Temp Rise 1.0 °C 07:02 0.8 °C 1.0 °C, 2026 0.3 °C, 2014
Max 1hr Temp Rise 4.7 °C 07:32 2.8 °C 4.7 °C, 2026 1.2 °C, 2011
Max 1hr Hum Rise 19% 23:32 12% 19%, 2026 4%, 2022
Max 10m Temp Fall 0.7 °C 23:54 0.8 °C 1.1 °C, 2019 0.3 °C, 2010
Max 1hr Temp Fall 2.4 °C 20:00 2.2 °C 4.5 °C, 2020 1.2 °C, 2022
Max 1hr Hum Fall 18% 07:39 12% 21%, 2012 6%, 2010
Max 10m Wind Speed 8.0 mph 19:17 9.2 mph 13.1 mph, 2011 6.1 mph, 2015
Minimum Feels-like 18.3 °C 05:10 9.0 °C 18.3 °C, 2026 3.0 °C, 2013
Maximum Feels-like 38.9 °C 13:52 21.6 °C 38.9 °C, 2026 15.9 °C, 2014
Mean Feels-like 30.3 °C 15.9 °C 30.3 °C, 2026 11.1 °C, 2021
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 19.4 °C (+10.8) 10.6 °C (+1.8) 19.4 °C (+10.8), 2026 4.2 °C (-4.4), 2011
Humidity Range 58% 38% 58%, 2012 22%, 2019
Pressure Range 6 hPa 4 hPa 15 hPa, 2009 2 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 14 [96%]180 hrs (115%) [49%] 14.6 [100%], 2012 0 [0%], 2014
Wet Hours 020 hrs (60%) [3.2%] 10, 2014 0, 2010
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 25.9 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 26th May 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