Daily Report for 25th June 2026

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 20.3 °C (+7.6) 05:34 14.2 °C (+2.3) 20.3 °C (+7.6), 2026 8.3 °C (-4.4), 2013
Maximum Temperature 31.9 °C (+10.1) 14:54 23.7 °C (+2.9) 31.9 °C (+10.1), 2026 20.2 °C (-1.6), 2013
Mean Temperature 26.3 °C (+8.9) 18.7 °C (+2.6) 26.3 °C, 2026 15.0 °C, 2013
Minimum Humidity 52% 13:20 53% 78%, 2019 25%, 2018
Maximum Humidity 82% 05:19 87% 95%, 2011 69%, 2010
Mean Humidity 67% 72% 88%, 2019 51%, 2018
Minimum Pressure 1015 hPa 12:42 1014 hPa 1026 hPa, 2013 1005 hPa, 2022
Maximum Pressure 1021 hPa 03:02 1020 hPa 1030 hPa, 2013 1011 hPa, 2022
Mean Pressure 1019 hPa 1017 hPa 1029 hPa, 2013 1009 hPa, 2022
Mean Wind Speed 6.7 mph (+2.3) 5.7 mph (+1.3) 6.9 mph, 2022 1.9 mph, 2018
Maximum Wind Speed 13.0 mph 14:06 14.5 mph 18.0 mph, 2023 7.0 mph, 2018
Maximum Gust 23.0 mph 13:21 23.5 mph 27.6 mph, 2023 10.9 mph, 2013
Mean Wind Direction ESE
Rainfall 0.0 mm 99.2 mm (253%) 6.8 mm, 2019
Maximum Hourly Rain n/a 4.4, 2019
Maximum 10-min Rain n/a 1.4, 2016
Maximum Rain Rate n/a 36, 2016
Minimum Dew Point 17.1 °C 06:31 10.6 °C 17.1 °C, 2026 3.6 °C, 2013
Maximum Dew Point 21.8 °C 16:16 15.5 °C 21.8 °C, 2026 8.7 °C, 2013
Mean Dew Point 19.6 °C 13.2 °C 19.6 °C, 2026 5.8 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 20.3 °C 05:34 14.4 °C 20.3 °C, 2026 8.3 °C, 2013
Day Maximum (09-21) 31.9 °C 14:36 23.6 °C 31.9 °C, 2026 20.2 °C, 2013
Max 10m Temp Rise 0.5 °C 02:51 0.9 °C 0.9 °C, 2023 0.4 °C, 2011
Max 1hr Temp Rise 2.0 °C 02:52 2.4 °C 4.3 °C, 2024 1.4 °C, 2011
Max 1hr Hum Rise 15% 03:51 10% 21%, 2016 5%, 2011
Max 10m Temp Fall 0.5 °C 03:15 0.9 °C 1.1 °C, 2016 0.3 °C, 2025
Max 1hr Temp Fall 2.0 °C 03:51 2.1 °C 3.1 °C, 2016 1.3 °C, 2019
Max 1hr Hum Fall 13% 02:51 12% 22%, 2024 6%, 2010
Max 10m Wind Speed 10.6 mph 17:59 10.6 mph 14.1 mph, 2023 5.0 mph, 2010
Minimum Feels-like 26.0 °C 05:35 16.1 °C 26.0 °C, 2026 7.2 °C, 2013
Maximum Feels-like 40.9 °C 14:54 27.5 °C 40.9 °C, 2026 20.2 °C, 2013
Mean Feels-like 33.5 °C 21.8 °C 33.5 °C, 2026 15.0 °C, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Minimum PM2.5 n/a 0 0 , 2009 0 , 2012
Maximum PM2.5 n/a 0 n/a n/a
Mean PM2.5 n/a 0 n/a n/a
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 11.6 °C (+2.5) 9.6 °C (+0.6) 16.7 °C (+7.7), 2018 6.7 °C (-2.4), 2019
Humidity Range 30% 34% 61%, 2018 17%, 2019
Pressure Range 6 hPa 6 hPa 9 hPa, 2019 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 15 [99%]173 hrs (107%) [46%] 15.2 [100%], 2018 0.4 [3%], 2019
Wet Hours 046 hrs (150%) [7.7%] 6, 2019 0, 2009
Cloud Cover Sunny
Events Maximum possible sunshine
Comments -
Extra Comments
Issues internet outage; used islington cwop for live but corrected from logs
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 25.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 25th June 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

day graph

Webcam Summary of Cloud Conditions

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose