Daily Report for 13th May 2026

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 6.8 °C (-1.8) 23:54 7.7 °C (-0.3) 12.7 °C (+4.1), 2024 1.3 °C (-7.3), 2010
Maximum Temperature 13.2 °C (-4.2) 10:15 17.4 °C (+0.6) 24.0 °C (+6.6), 2025 11.9 °C (-5.5), 2020
Mean Temperature 9.7 °C (-3.0) 12.8 °C (+0.1) 17.2 °C, 2025 7.9 °C, 2010
Minimum Humidity 57% 10:16 50% 85%, 2023 33%, 2015
Maximum Humidity 84% 21:58 85% 94%, 2025 73%, 2015
Mean Humidity 73% 69% 89%, 2023 52%, 2015
Minimum Pressure 1002 hPa 12:53 1013 hPa 1038 hPa, 2019 1002 hPa, 2026
Maximum Pressure 1011 hPa 00:01 1018 hPa 1042 hPa, 2019 1009 hPa, 2021
Mean Pressure 1005 hPa 1015 hPa 1040 hPa, 2019 1005 hPa, 2026
Mean Wind Speed 5.2 mph (+0.5) 3.7 mph (-1.0) 8.5 mph, 2013 2.2 mph, 2014
Maximum Wind Speed 17.5 mph 10:40 12.0 mph 21.3 mph, 2013 7.4 mph, 2018
Maximum Gust 31.1 mph 10:41 19.0 mph 32.4 mph, 2013 10.4 mph, 2018
Mean Wind Direction NW
Rainfall 3.8 mm 5.0 mm (26%) 4.3 mm, 2021
Maximum Hourly Rain 1.2 mm 15:02 1.7 mm, 2021
Maximum 10-min Rain 0.6 mm 14:23 1.4 mm, 2021
Maximum Rain Rate 4.8 mm/h 14:19 24 mm/h, 2014
Minimum Dew Point 2.6 °C 01:09 3.9 °C 9.8 °C, 2024 -1.9 °C, 2019
Maximum Dew Point 7.0 °C 11:42 9.5 °C 13.4 °C, 2024 3.7 °C, 2010
Mean Dew Point 4.9 °C 6.8 °C 12.1 °C, 2024 0.6 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 8.7 °C * 03:29 8.1 °C 12.7 °C, 2024 1.3 °C, 2010
Day Maximum (09-21) 13.2 °C 10:15 17.4 °C 24.0 °C, 2025 11.9 °C, 2020
Max 10m Temp Rise 1.1 °C 11:24 0.8 °C 1.1 °C, 2012 0.3 °C, 2009
Max 1hr Temp Rise 3.3 °C 12:11 2.7 °C 4.5 °C, 2012 0.9 °C, 2009
Max 1hr Hum Rise 23% 11:15 12% 23%, 2026 2%, 2023
Max 10m Temp Fall 2.9 °C 10:44 0.8 °C 2.9 °C, 2026 0.2 °C, 2023
Max 1hr Temp Fall 4.6 °C 11:10 2.2 °C 4.6 °C, 2026 0.6 °C, 2009
Max 1hr Hum Fall 17% 12:16 12% 23%, 2013 3%, 2009
Max 10m Wind Speed 13.8 mph 10:43 8.9 mph 16.7 mph, 2013 4.8 mph, 2018
Minimum Feels-like 4.0 °C 23:08 6.5 °C 14.0 °C, 2024 -0.7 °C, 2010
Maximum Feels-like 13.2 °C 10:14 18.1 °C 25.6 °C, 2025 11.9 °C, 2020
Mean Feels-like 8.6 °C 13.0 °C 18.3 °C, 2024 7.1 °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 6.4 °C (-2.4) 9.8 °C (+0.9) 13.7 °C (+4.9), 2012 3.1 °C (-5.7), 2023
Humidity Range 27% 35% 59%, 2019 7%, 2023
Pressure Range 10 hPa 5 hPa 15 hPa, 2012 3 hPa, 2021
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4.9 [35%]77 hrs (100%) [43%] 14 [100%], 2019 0 [0%], 2009
Wet Hours 5
[Mean rain rate: 0.8 mm/h]		8 hrs (48%) [2.6%] 6, 2021 0, 2010
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 11.4 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 13th 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