Daily Report for 21st November 2025


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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature -0.2 °C (-4.9) 18:28 7.7 °C (+1.9) 11.7 °C (+7.0), 2017 -0.7 °C (-5.4), 2024
Maximum Temperature 5.9 °C (-4.3) 13:43 12.6 °C (+1.6) 15.0 °C (+4.8), 2009 3.0 °C (-7.2), 2024
Mean Temperature 1.9 °C (-4.6) 10.4 °C (+1.7) 12.7 °C, 2017 0.6 °C, 2024
Minimum Humidity 71% 13:50 75% 96%, 2011 55%, 2015
Maximum Humidity 90% 07:22 91% 98%, 2009 80%, 2016
Mean Humidity 85% 84% 98%, 2011 69%, 2015
Minimum Pressure 1020 hPa 00:00 1007 hPa 1025 hPa, 2020 983 hPa, 2022
Maximum Pressure 1029 hPa 19:23 1014 hPa 1031 hPa, 2023 994 hPa, 2016
Mean Pressure 1026 hPa 1011 hPa 1027 hPa, 2020 988 hPa, 2016
Mean Wind Speed 3.4 mph (-1.2) 4.9 mph (+0.3) 8.9 mph, 2020 0.8 mph, 2021
Maximum Wind Speed 11.1 mph 00:42 13.2 mph 21.3 mph, 2022 8.1 mph, 2021
Maximum Gust 17.3 mph 00:55 21.1 mph 35.1 mph, 2012 13.2 mph, 2011
Mean Wind Direction N
Rainfall 0.0 mm 43.8 mm (93%) 15.0 mm, 2016
Maximum Hourly Rain n/a 4.4, 2009
Maximum 10-min Rain n/a 2.1, 2016
Maximum Rain Rate n/a 54, 2016
Minimum Dew Point -2.2 °C 18:16 5.4 °C 9.3 °C, 2017 -7.4 °C, 2015
Maximum Dew Point 1.7 °C 12:26 9.7 °C 13.2 °C, 2009 0.0 °C, 2024
Mean Dew Point -0.4 °C 7.8 °C 11.3 °C, 2009 -2.5 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 0.5 °C * 07:48 8.7 °C 11.7 °C, 2017 -0.7 °C, 2024
Day Maximum (09-21) 5.9 °C 13:40 12.5 °C 15.0 °C, 2009 3.0 °C, 2024
Max 10m Temp Rise 0.9 °C 18:58 0.4 °C 0.9 °C, 2025 0.1 °C, 2010
Max 1hr Temp Rise 1.9 °C 19:19 1.2 °C 2.6 °C, 2015 0.4 °C, 2010
Max 1hr Hum Rise 6% 16:38 5% 8%, 2013 1%, 2011
Max 10m Temp Fall 0.7 °C 16:17 0.4 °C 1.1 °C, 2012 0.2 °C, 2010
Max 1hr Temp Fall 2.5 °C 16:46 1.2 °C 2.9 °C, 2012 0.4 °C, 2019
Max 1hr Hum Fall 6% 12:05 6% 15%, 2015 2%, 2014
Max 10m Wind Speed 9.0 mph 04:15 9.9 mph 15.8 mph, 2022 6.2 mph, 2021
Minimum Feels-like -5.0 °C 06:02 6.3 °C 12.9 °C, 2017 -5.9 °C, 2024
Maximum Feels-like 5.8 °C 13:15 14.1 °C 17.6 °C, 2009 2.6 °C, 2024
Mean Feels-like -0.4 °C 10.7 °C 14.2 °C, 2009 -1.7 °C, 2024
Air-frost Hrs 0.7 hrs 0.4 hrs 6 hrs, 2024 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.1 °C (+0.6) 4.9 °C (-0.3) 7.5 °C (+2.0), 2016 2.1 °C (-3.4), 2010
Humidity Range 19% 16% 38%, 2015 2%, 2011
Pressure Range 9 hPa 7 hPa 26 hPa, 2022 3 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [104%]55 hrs (91%) [32%] 8 [104%], 2025 0 [0%], 2012
Wet Hours 047 hrs (105%) [9.2%] 10, 2016 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 4.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 21st November 2025.
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