Daily Report for 25th May 2026


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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.7 °C (+5.6) 05:38 9.3 °C (+0.5) 15.7 °C (+5.6), 2026 4.9 °C (-5.2), 2013
Maximum Temperature 33.2 °C (+14.5) 15:25 19.5 °C (+2.0) 33.2 °C (+14.5), 2026 12.2 °C (-6.5), 2016
Mean Temperature 25.4 °C (+10.0) 14.5 °C (+1.3) 25.4 °C, 2026 10.0 °C, 2013
Minimum Humidity 36% 12:52 48% 73%, 2018 27%, 2011
Maximum Humidity 85% 05:58 85% 97%, 2013 72%, 2011
Mean Humidity 58% 68% 82%, 2018 46%, 2011
Minimum Pressure 1030 hPa 20:02 1014 hPa 1034 hPa, 2020 1008 hPa, 2025
Maximum Pressure 1033 hPa 09:12 1019 hPa 1037 hPa, 2020 1015 hPa, 2010
Mean Pressure 1032 hPa 1017 hPa 1035 hPa, 2020 1011 hPa, 2025
Mean Wind Speed 2.9 mph (-1.8) 4.1 mph (-0.6) 8.9 mph, 2025 1.7 mph, 2018
Maximum Wind Speed 10.0 mph 18:37 12.5 mph 18.7 mph, 2025 8.6 mph, 2017
Maximum Gust 16.1 mph 16:19 20.0 mph 31.0 mph, 2009 12.8 mph, 2015
Mean Wind Direction SE
Rainfall 0.0 mm 11.4 mm (31%) 0.8 mm, 2025
Maximum Hourly Rain n/a 0.4, 2025
Maximum 10-min Rain n/a 0.2, 2022
Maximum Rain Rate n/a n/a
Minimum Dew Point 12.9 °C 05:03 5.4 °C 12.9 °C, 2026 -0.4 °C, 2011
Maximum Dew Point 18.8 °C 16:46 10.9 °C 18.8 °C, 2026 6.6 °C, 2011
Mean Dew Point 15.8 °C 8.2 °C 15.8 °C, 2026 3.0 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.7 °C 05:39 9.5 °C 15.7 °C, 2026 4.9 °C, 2013
Day Maximum (09-21) 33.2 °C 15:45 19.5 °C 33.2 °C, 2026 12.2 °C, 2016
Max 10m Temp Rise 0.8 °C 06:41 0.8 °C 1.1 °C, 2011 0.4 °C, 2010
Max 1hr Temp Rise 3.8 °C 07:19 2.7 °C 5.3 °C, 2011 1.3 °C, 2016
Max 1hr Hum Rise 6% 21:06 12% 17%, 2020 4%, 2015
Max 10m Temp Fall 0.5 °C 21:57 0.8 °C 0.9 °C, 2025 0.2 °C, 2016
Max 1hr Temp Fall 2.2 °C 22:43 2.2 °C 3.3 °C, 2013 0.5 °C, 2016
Max 1hr Hum Fall 13% 10:33 12% 18%, 2014 5%, 2016
Max 10m Wind Speed 8.1 mph 17:10 9.3 mph 14.4 mph, 2025 6.4 mph, 2015
Minimum Feels-like 18.5 °C 05:38 8.6 °C 18.6 °C, 2012 0.8 °C, 2013
Maximum Feels-like 39.6 °C 16:10 20.9 °C 39.6 °C, 2026 12.3 °C, 2016
Mean Feels-like 30.0 °C 15.3 °C 30.0 °C, 2026 9.0 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 17.5 °C (+8.9) 10.3 °C (+1.5) 17.5 °C (+8.9), 2026 3.4 °C (-5.2), 2016
Humidity Range 49% 37% 57%, 2013 18%, 2018
Pressure Range 3 hPa 4 hPa 16 hPa, 2011 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 14.5 [100%]166 hrs (110%) [47%] 14.5 [100%], 2026 0 [0%], 2016
Wet Hours 020 hrs (62%) [3.3%] 2, 2025 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 19.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 25th 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

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose