Daily Report for 11th July 2026


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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 17.5 °C (+3.5) 05:42 17.3 °C (+3.6) 17.5 °C (+3.5), 2010 9.8 °C (-4.2), 2020
Maximum Temperature 29.4 °C (+6.3) 16:45 30.3 °C (+7.5) 31.8 °C (+8.8), 2025 19.4 °C (-3.7), 2012
Mean Temperature 23.8 °C (+4.9) 24.0 °C (+5.6) 25.4 °C, 2025 15.2 °C, 2012
Minimum Humidity 38% 16:48 35% 82%, 2014 33%, 2015
Maximum Humidity 83% 05:56 76% 95%, 2009 65%, 2015
Mean Humidity 61% 55% 90%, 2014 48%, 2015
Minimum Pressure 1021 hPa 00:05 1021 hPa 1024 hPa, 2020 1005 hPa, 2016
Maximum Pressure 1025 hPa 23:57 1025 hPa 1029 hPa, 2020 1011 hPa, 2012
Mean Pressure 1022 hPa 1022 hPa 1027 hPa, 2020 1008 hPa, 2016
Mean Wind Speed 5.8 mph (+1.5) 4.6 mph (+0.3) 11.2 mph, 2016 2.1 mph, 2025
Maximum Wind Speed 12.2 mph 20:34 12.9 mph 23.7 mph, 2016 7.8 mph, 2014
Maximum Gust 20.7 mph 16:47 19.9 mph 38.7 mph, 2016 12.3 mph, 2011
Mean Wind Direction E
Rainfall 0.0 mm 0.0 mm (0%) 29.7 mm, 2017
Maximum Hourly Rain n/a 6.6, 2017
Maximum 10-min Rain n/a 4.8, 2017
Maximum Rain Rate n/a 54, 2016
Minimum Dew Point 13.2 °C 16:51 10.5 °C 14.3 °C, 2023 6.0 °C, 2013
Maximum Dew Point 17.9 °C 19:05 16.3 °C 17.9 °C, 2026 9.3 °C, 2013
Mean Dew Point 15.3 °C 13.7 °C 15.3 °C, 2026 7.7 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 17.5 °C 05:43 17.3 °C 17.5 °C, 2010 9.8 °C, 2020
Day Maximum (09-21) 29.4 °C 16:45 30.3 °C 31.8 °C, 2025 19.4 °C, 2012
Max 10m Temp Rise 0.8 °C 12:17 0.8 °C 0.9 °C, 2013 0.3 °C, 2014
Max 1hr Temp Rise 2.3 °C 08:21 2.6 °C 4.0 °C, 2025 1.0 °C, 2014
Max 1hr Hum Rise 12% 19:20 9% 18%, 2012 4%, 2014
Max 10m Temp Fall 0.6 °C 19:07 0.7 °C 0.9 °C, 2009 0.3 °C, 2014
Max 1hr Temp Fall 2.3 °C 21:20 2.4 °C 3.0 °C, 2012 1.2 °C, 2009
Max 1hr Hum Fall 10% 11:05 10% 15%, 2012 4%, 2014
Max 10m Wind Speed 9.8 mph 16:56 9.6 mph 18.0 mph, 2016 5.2 mph, 2014
Minimum Feels-like 21.1 °C 05:41 19.6 °C 21.1 °C, 2026 8.3 °C, 2020
Maximum Feels-like 34.2 °C 18:57 34.1 °C 36.1 °C, 2025 20.8 °C, 2012
Mean Feels-like 27.9 °C 27.3 °C 29.4 °C, 2025 16.2 °C, 2020
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Minimum PM2.5 8 18:30 4 8, 2026 0, 2012
Maximum PM2.5 22 03:25 18 22, 2026 22, 2026
Mean PM2.5 13 9 13, 2026 13, 2026
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 11.9 °C (+2.9) 13.0 °C (+4.0) 15.6 °C (+6.6), 2025 5.0 °C (-4.0), 2017
Humidity Range 45% 41% 52%, 2011 12%, 2014
Pressure Range 4 hPa 4 hPa 6 hPa, 2023 1 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 14.5 [97%]127 hrs (179%) [77%] 14.6 [98%], 2025 0 [0%], 2014
Wet Hours 00 hrs (0%) [0%] 8, 2017 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 25.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 11th July 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