Daily Report for 23rd June 2026

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 18.5 °C (+5.9) 03:45 13.6 °C (+1.8) 18.5 °C (+5.9), 2026 7.7 °C (-4.9), 2021
Maximum Temperature 33.9 °C (+12.3) 17:04 22.8 °C (+2.2) 33.9 °C (+12.3), 2026 17.2 °C (-4.4), 2013
Mean Temperature 25.8 °C (+9.1) 17.9 °C (+2.0) 25.8 °C, 2026 14.9 °C, 2013
Minimum Humidity 39% 15:34 54% 85%, 2016 24%, 2018
Maximum Humidity 93% 07:52 87% 93%, 2026 69%, 2010
Mean Humidity 68% 72% 88%, 2016 50%, 2010
Minimum Pressure 1018 hPa 18:52 1013 hPa 1027 hPa, 2018 1005 hPa, 2013
Maximum Pressure 1025 hPa 03:18 1019 hPa 1031 hPa, 2018 1014 hPa, 2022
Mean Pressure 1021 hPa 1016 hPa 1029 hPa, 2018 1009 hPa, 2013
Mean Wind Speed 4.1 mph (-0.3) 5.8 mph (+1.4) 8.7 mph, 2025 0.7 mph, 2014
Maximum Wind Speed 14.3 mph 14:22 14.8 mph 18.7 mph, 2025 7.4 mph, 2014
Maximum Gust 17.3 mph 14:22 24.0 mph 27.6 mph, 2025 10.2 mph, 2014
Mean Wind Direction SE
Rainfall 32.6 mm 99.2 mm (275%) 32.6 mm, 2026
Maximum Hourly Rain 32.0 mm 04:12 32.0 mm, 2026
Maximum 10-min Rain 9.4 mm 03:32 9.4 mm, 2026
Maximum Rain Rate 84 mm/h 03:31 102 mm/h, 2016
Minimum Dew Point 14.5 °C 00:11 10.0 °C 15.1 °C, 2016 0.6 °C, 2018
Maximum Dew Point 22.3 °C 11:15 14.9 °C 22.3 °C, 2026 8.4 °C, 2015
Mean Dew Point 18.8 °C 12.5 °C 18.8 °C, 2026 7.3 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 18.5 °C 03:46 13.8 °C 18.5 °C, 2016 7.7 °C, 2021
Day Maximum (09-21) 33.9 °C 17:04 22.8 °C 33.9 °C, 2026 17.2 °C, 2013
Max 10m Temp Rise 0.7 °C 11:15 0.9 °C 1.5 °C, 2016 0.5 °C, 2010
Max 1hr Temp Rise 2.8 °C 11:15 2.4 °C 3.8 °C, 2022 1.4 °C, 2013
Max 1hr Hum Rise 11% 20:07 10% 17%, 2013 6%, 2010
Max 10m Temp Fall 0.6 °C 20:26 0.8 °C 0.7 °C, 2012 0.3 °C, 2017
Max 1hr Temp Fall 2.2 °C 20:19 2.0 °C 2.7 °C, 2021 1.1 °C, 2019
Max 1hr Hum Fall 16% 12:01 13% 22%, 2022 6%, 2016
Max 10m Wind Speed 9.4 mph 14:13 10.8 mph 14.4 mph, 2025 4.5 mph, 2014
Minimum Feels-like 22.8 °C 02:55 15.2 °C 22.9 °C, 2016 7.7 °C, 2021
Maximum Feels-like 41.1 °C 16:52 26.1 °C 41.1 °C, 2026 18.0 °C, 2013
Mean Feels-like 32.5 °C 20.6 °C 32.5 °C, 2026 15.5 °C, 2015
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 15.4 °C (+6.3) 9.2 °C (+0.3) 15.9 °C (+6.8), 2020 3.3 °C (-5.8), 2016
Humidity Range 54% 34% 60%, 2018 6%, 2016
Pressure Range 7 hPa 6 hPa 11 hPa, 2013 2 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 12.4 [82%]144 hrs (97%) [42%] 15.1 [100%], 2020 0.1 [1%], 2016
Wet Hours 2
[Mean rain rate: 16 mm/h]		46 hrs (163%) [8.4%] 12, 2016 0, 2009
Cloud Cover unknown
Events Severe Thunderstorm
Comments strong t-s with Torrential rn 3a
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 24.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 23rd 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.
View monthly summary

Daily Graph of Conditions

day graph

Webcam Summary of Cloud Conditions

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose