Daily Report for 9th May 2026

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.2 °C (+0.1) 05:21 9.4 °C (+1.7) 14.2 °C (+6.1), 2016 5.9 °C (-2.2), 2022
Maximum Temperature 21.2 °C (+4.2) 15:02 19.1 °C (+2.4) 24.8 °C (+7.8), 2016 11.5 °C (-5.5), 2010
Mean Temperature 14.8 °C (+2.2) 14.2 °C (+2.1) 18.5 °C, 2016 8.4 °C, 2010
Minimum Humidity 37% 14:40 49% 72%, 2012 31%, 2025
Maximum Humidity 87% 05:48 85% 96%, 2019 74%, 2017
Mean Humidity 59% 68% 90%, 2012 56%, 2016
Minimum Pressure 1017 hPa 15:15 1014 hPa 1025 hPa, 2024 993 hPa, 2019
Maximum Pressure 1020 hPa 09:03 1018 hPa 1030 hPa, 2024 1002 hPa, 2021
Mean Pressure 1019 hPa 1016 hPa 1028 hPa, 2024 998 hPa, 2019
Mean Wind Speed 4.2 mph (-0.5) 3.4 mph (-1.3) 10.0 mph, 2013 2.4 mph, 2019
Maximum Wind Speed 13.6 mph 17:14 11.0 mph 24.6 mph, 2013 8.2 mph, 2024
Maximum Gust 19.6 mph 17:02 16.9 mph 38.4 mph, 2013 11.5 mph, 2024
Mean Wind Direction ESE
Rainfall 0.0 mm 0.4 mm (3%) 10.4 mm, 2023
Maximum Hourly Rain n/a 4.3, 2023
Maximum 10-min Rain n/a 1.5, 2023
Maximum Rain Rate n/a 14.4, 2023
Minimum Dew Point 1.9 °C 20:25 5.5 °C 10.3 °C, 2023 0.5 °C, 2025
Maximum Dew Point 9.3 °C 09:50 10.4 °C 14.9 °C, 2024 4.3 °C, 2017
Mean Dew Point 6.3 °C 8.0 °C 12.2 °C, 2023 2.6 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 8.2 °C 05:21 9.4 °C 14.2 °C, 2016 5.9 °C, 2022
Day Maximum (09-21) 21.2 °C 15:12 19.1 °C 24.8 °C, 2016 11.5 °C, 2010
Max 10m Temp Rise 0.6 °C 08:50 0.8 °C 1.0 °C, 2020 0.5 °C, 2010
Max 1hr Temp Rise 2.9 °C 09:21 2.5 °C 4.8 °C, 2020 1.5 °C, 2023
Max 1hr Hum Rise 8% 21:36 10% 28%, 2013 5%, 2015
Max 10m Temp Fall 0.6 °C 15:50 0.6 °C 1.2 °C, 2013 0.3 °C, 2010
Max 1hr Temp Fall 1.6 °C 18:40 1.9 °C 3.3 °C, 2023 1.1 °C, 2012
Max 1hr Hum Fall 11% 09:25 11% 24%, 2013 6%, 2012
Max 10m Wind Speed 10.3 mph 17:18 8.2 mph 18.7 mph, 2013 5.8 mph, 2024
Minimum Feels-like 6.8 °C 06:16 8.7 °C 14.2 °C, 2016 2.8 °C, 2025
Maximum Feels-like 21.3 °C 15:00 20.0 °C 27.4 °C, 2024 11.5 °C, 2010
Mean Feels-like 14.9 °C 14.8 °C 20.1 °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 13.0 °C (+4.1) 9.6 °C (+0.7) 15.9 °C (+7.0), 2022 4.5 °C (-4.4), 2012
Humidity Range 50% 36% 58%, 2025 23%, 2012
Pressure Range 3 hPa 4 hPa 14 hPa, 2017 2 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 13.9 [101%]59 hrs (112%) [48%] 13.9 [101%], 2026 0 [0%], 2012
Wet Hours 01 hrs (9%) [0.5%] 7, 2023 0, 2009
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 15.4 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 9th 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