Daily Report for 9th March 2025

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.6 °C (+3.8) 07:05 2.2 °C (-1.4) 8.6 °C (+4.8), 2022 1.1 °C (-2.7), 2010
Maximum Temperature 17.5 °C (+7.2) 14:46 13.6 °C (+3.7) 19.3 °C (+9.1), 2014 6.8 °C (-3.5), 2010
Mean Temperature 11.9 °C (+5.5) 7.9 °C (+1.2) 13.3 °C, 2014 4.1 °C, 2010
Minimum Humidity 44% 12:53 47% 94%, 2023 35%, 2014
Maximum Humidity 76% 07:05 88% 99%, 2023 69%, 2014
Mean Humidity 62% 71% 96%, 2023 52%, 2014
Minimum Pressure 1002 hPa 15:26 1019 hPa 1034 hPa, 2012 984 hPa, 2023
Maximum Pressure 1007 hPa 00:00 1024 hPa 1036 hPa, 2012 996 hPa, 2023
Mean Pressure 1004 hPa 1021 hPa 1035 hPa, 2012 992 hPa, 2023
Mean Wind Speed 4.7 mph (-0.5) 3.0 mph (-2.2) 8.3 mph, 2019 3.0 mph, 2013
Maximum Wind Speed 14.4 mph 12:34 10.6 mph 21.9 mph, 2019 9.2 mph, 2013
Maximum Gust 19.6 mph 12:35 15.1 mph 39.2 mph, 2019 13.2 mph, 2013
Mean Wind Direction ESE
Rainfall 0.0 mm 0.0 mm (0%) 13.9 mm, 2016
Maximum Hourly Rain n/a 3.7, 2016
Maximum 10-min Rain n/a 0.9, 2016
Maximum Rain Rate n/a 24, 2016
Minimum Dew Point 3.5 °C 05:44 0.0 °C 5.0 °C, 2022 -2.8 °C, 2009
Maximum Dew Point 6.4 °C 12:09 4.9 °C 9.5 °C, 2018 2.1 °C, 2009
Mean Dew Point 4.7 °C 2.4 °C 6.5 °C, 2022 0.0 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 7.6 °C 06:50 2.2 °C 9.5 °C, 2017 1.1 °C, 2010
Day Maximum (09-21) 17.5 °C 14:30 13.6 °C 19.3 °C, 2014 6.4 °C, 2013
Max 10m Temp Rise 0.6 °C 10:09 0.9 °C 1.2 °C, 2023 0.2 °C, 2013
Max 1hr Temp Rise 2.6 °C 10:31 3.4 °C 3.8 °C, 2015 0.4 °C, 2013
Max 1hr Hum Rise 6% 18:06 9% 18%, 2020 2%, 2013
Max 10m Temp Fall 0.4 °C 15:03 0.5 °C 0.6 °C, 2017 0.2 °C, 2010
Max 1hr Temp Fall 1.5 °C 18:07 1.9 °C 2.8 °C, 2020 0.5 °C, 2023
Max 1hr Hum Fall 9% 10:31 14% 18%, 2019 3%, 2012
Max 10m Wind Speed 9.9 mph 14:06 7.8 mph 19.1 mph, 2019 6.7 mph, 2013
Minimum Feels-like 5.1 °C 04:51 0.5 °C 7.0 °C, 2014 -3.4 °C, 2023
Maximum Feels-like 17.5 °C 14:13 13.7 °C 19.3 °C, 2014 6.8 °C, 2010
Mean Feels-like 11.4 °C 7.5 °C 13.2 °C, 2014 2.1 °C, 2010
Air-frost Hrs 0 hrs 2 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.9 °C (+3.5) 11.4 °C (+5.1) 10.9 °C (+4.5), 2014 3.5 °C (-2.9), 2022
Humidity Range 32% 41% 48%, 2019 5%, 2023
Pressure Range 5 hPa 5 hPa 22 hPa, 2016 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 10 [98%]80 hrs (259%) [88%] 10.2 [100%], 2014 0 [0%], 2012
Wet Hours 00 hrs (0%) [0%] 11, 2016 , 2009
Cloud Cover Sunny with periods of Hazy
Events Maximum possible sunshine
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 6.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 9th March 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.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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