Daily Report for 27th June 2026

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 20.6 °C (+7.7) 05:34 14.7 °C (+2.7) 20.6 °C (+7.7), 2026 10.0 °C (-2.9), 2013
Maximum Temperature 21.6 °C (-0.3) 14:04 24.1 °C (+3.2) 31.9 °C (+10.0), 2011 19.2 °C (-2.7), 2022
Mean Temperature 26.0 °C (+3.7) 19.3 °C (+3.0) 26.0 °C, 2026 15.0 °C, 2013
Minimum Humidity 40% 14:19 52% 79%, 2021 29%, 2010
Maximum Humidity 84% 05:34 87% 94%, 2009 79%, 2015
Mean Humidity 59% 71% 87%, 2021 55%, 2010
Minimum Pressure 1015 hPa 18:44 1014 hPa 1028 hPa, 2019 1002 hPa, 2017
Maximum Pressure 1015 hPa 07:54 1019 hPa 1031 hPa, 2019 1009 hPa, 2020
Mean Pressure 1012 hPa 1016 hPa 1030 hPa, 2019 1006 hPa, 2020
Mean Wind Speed 3.2 mph (-1.2) 5.5 mph (+1.1) 9.3 mph, 2020 1.5 mph, 2009
Maximum Wind Speed 8.0 mph 19:50 14.0 mph 21.1 mph, 2020 8.0 mph, 2026
Maximum Gust 14.0 mph 16:30 22.9 mph 34.6 mph, 2020 11.5 mph, 2017
Mean Wind Direction ESE
Rainfall 2.0 mm 101.2 mm (239%) 35.8 mm, 2009
Maximum Hourly Rain 2.0 mm 05:00 33.3 mm, 2009
Maximum 10-min Rain 0.5 mm 05:00 8.0 mm, 2009
Maximum Rain Rate 20 mm/h 05:00 96 mm/h, 2009
Minimum Dew Point 14.9 °C 12:09 10.8 °C 14.9 °C, 2026 5.9 °C, 2013
Maximum Dew Point 19.5 °C 08:36 15.9 °C 19.5 °C, 2026 10.9 °C, 2013
Mean Dew Point 17.0 °C 13.5 °C 17.0 °C, 2026 8.5 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 21.1 °C * 05:34 14.9 °C 21.1 °C, 2026 10.0 °C, 2013
Day Maximum (09-21) * 31.1 °C * 13:54 24.4 °C 31.9 °C, 2011 19.2 °C, 2022
Max 10m Temp Rise 1.1 °C 07:30 0.9 °C 1.1 °C, 2026 0.2 °C, 2021
Max 1hr Temp Rise 2.2 °C 09:05 2.5 °C 3.5 °C, 2009 1.0 °C, 2021
Max 1hr Hum Rise 15% 05:10 11% 33%, 2009 5%, 2012
Max 10m Temp Fall 1.1 °C 13:45 0.9 °C 2.0 °C, 2009 0.4 °C, 2012
Max 1hr Temp Fall 2.2 °C 05:30 2.1 °C 6.5 °C, 2009 1.0 °C, 2023
Max 1hr Hum Fall 13% 09:45 12% 19%, 2020 3%, 2021
Max 10m Wind Speed 4.5 mph 20:49 10.2 mph 16.1 mph, 2020 4.5 mph, 2026
Minimum Feels-like 27.3 °C 05:30 17.0 °C 27.3 °C, 2026 10.0 °C, 2013
Maximum Feels-like 36.2 °C 13:35 28.3 °C 36.2 °C, 2026 20.6 °C, 2013
Mean Feels-like 31.4 °C 22.6 °C 31.4 °C, 2026 15.6 °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 1.0 °C (-8.1) 9.4 °C (+0.5) 17.9 °C (+8.8), 2010 1.0 °C (-8.1), 2026
Humidity Range 44% 35% 57%, 2010 14%, 2021
Pressure Range -0 hPa 6 hPa 9 hPa, 2012 -0 hPa, 2026
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6.8 [45%]194 hrs (111%) [48%] 14.5 [96%], 2010 0 [0%], 2017
Wet Hours 1
[Mean rain rate: 2.0 mm/h]		47 hrs (142%) [7.3%] 10, 2017 0, 2010
Cloud Cover unknown
Events None
Comments rn
Extra Comments
Issues data outage; used islington cwop
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 27th 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