Daily Report for 11th May 2026

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 1.5 °C (-6.8) 04:29 8.4 °C (+0.5) 14.7 °C (+6.3), 2016 1.5 °C (-6.8), 2026
Maximum Temperature 12.4 °C (-4.8) 17:17 17.9 °C (+1.2) 24.0 °C (+6.8), 2025 9.2 °C (-8.0), 2010
Mean Temperature 7.5 °C (-5.8) 13.3 °C (+0.9) 17.7 °C, 2025 6.8 °C, 2010
Minimum Humidity 51% 18:34 50% 80%, 2016 34%, 2025
Maximum Humidity 85% 13:18 85% 95%, 2024 72%, 2020
Mean Humidity 72% 68% 88%, 2016 54%, 2025
Minimum Pressure 1011 hPa 06:09 1014 hPa 1021 hPa, 2009 993 hPa, 2017
Maximum Pressure 1018 hPa 23:44 1018 hPa 1033 hPa, 2012 1001 hPa, 2017
Mean Pressure 1013 hPa 1016 hPa 1023 hPa, 2012 995 hPa, 2017
Mean Wind Speed 2.4 mph (-2.3) 3.5 mph (-1.2) 9.9 mph, 2014 2.0 mph, 2019
Maximum Wind Speed 9.3 mph 08:12 11.2 mph 18.5 mph, 2013 8.6 mph, 2016
Maximum Gust 16.1 mph 16:20 17.7 mph 30.0 mph, 2020 11.5 mph, 2016
Mean Wind Direction NNE
Rainfall 0.8 mm 1.2 mm (7%) 17.7 mm, 2016
Maximum Hourly Rain 0.8 mm 13:04 8.1 mm, 2016
Maximum 10-min Rain 0.2 mm 13:04 4.1 mm, 2016
Maximum Rain Rate 0.4 mm/h 12:51 54 mm/h, 2016
Minimum Dew Point -1.2 °C 02:54 4.5 °C 9.1 °C, 2022 -1.5 °C, 2020
Maximum Dew Point 6.8 °C 13:38 9.8 °C 18.8 °C, 2016 1.4 °C, 2010
Mean Dew Point 2.6 °C 7.3 °C 14.4 °C, 2016 -0.2 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 1.5 °C 04:29 8.7 °C 14.7 °C, 2016 1.5 °C, 2026
Day Maximum (09-21) 12.4 °C 17:17 17.9 °C 24.0 °C, 2025 9.2 °C, 2010
Max 10m Temp Rise 0.7 °C 15:49 0.8 °C 1.0 °C, 2011 0.4 °C, 2010
Max 1hr Temp Rise 3.2 °C 07:21 2.4 °C 4.4 °C, 2018 1.2 °C, 2016
Max 1hr Hum Rise 10% 13:02 10% 24%, 2013 3%, 2016
Max 10m Temp Fall 0.7 °C 21:17 0.6 °C 1.3 °C, 2013 0.3 °C, 2010
Max 1hr Temp Fall 2.5 °C 21:31 2.0 °C 4.0 °C, 2013 1.2 °C, 2010
Max 1hr Hum Fall 12% 16:26 11% 20%, 2018 9%, 2015
Max 10m Wind Speed 6.6 mph 16:26 8.4 mph 13.8 mph, 2020 5.5 mph, 2010
Minimum Feels-like -0.7 °C 04:19 7.5 °C 14.9 °C, 2016 -0.7 °C, 2020
Maximum Feels-like 12.4 °C 17:16 18.7 °C 26.0 °C, 2024 7.9 °C, 2010
Mean Feels-like 6.8 °C 13.7 °C 20.2 °C, 2016 4.9 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 10.9 °C (+2.1) 9.6 °C (+0.6) 15.1 °C (+6.2), 2025 4.4 °C (-4.5), 2022
Humidity Range 34% 35% 53%, 2012 14%, 2016
Pressure Range 6 hPa 4 hPa 20 hPa, 2019 2 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3.8 [27%]63 hrs (97%) [42%] 13 [93%], 2025 0.5 [4%], 2016
Wet Hours 2
[Mean rain rate: 0.4 mm/h]		3 hrs (21%) [1.1%] 8, 2016 0, 2009
Cloud Cover unknown
Events None
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 8.9 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 11th 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