Daily Report for 2nd February 2021

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.7 °C (+0.7) 00:20 3.2 °C (+0.2) 10.3 °C (+7.3), 2017 -3.1 °C (-6.1), 2009
Maximum Temperature 12.4 °C (+4.5) 14:46 8.2 °C (+0.3) 13.0 °C (+5.1), 2020 0.2 °C (-7.7), 2009
Mean Temperature 8.8 °C (+2.6) 6.1 °C (+0.2) 10.9 °C, 2017 -1.4 °C, 2009
Minimum Humidity 82% 14:52 84% 87%, 2009 41%, 2012
Maximum Humidity 98% 08:22 97% 98%, 2011 65%, 2012
Mean Humidity 91% 91% 93%, 2010 54%, 2012
Minimum Pressure 994 hPa 05:59 993 hPa 1035 hPa, 2012 991 hPa, 2009
Maximum Pressure 1001 hPa 00:00 1002 hPa 1038 hPa, 2012 1001 hPa, 2021
Mean Pressure 996 hPa 997 hPa 1036 hPa, 2012 996 hPa, 2021
Mean Wind Speed 6.4 mph (+1.3) 4.0 mph (-1.1) 10.1 mph, 2024 2.5 mph, 2025
Maximum Wind Speed 16.0 mph 20:36 11.8 mph 21.5 mph, 2016 8.7 mph, 2015
Maximum Gust 24.0 mph 21:34 17.7 mph 33.4 mph, 2020 10.9 mph, 2015
Mean Wind Direction SSW
Rainfall 5.5 mm 5.7 mm (177%) 10.0 mm, 2009
Maximum Hourly Rain 2.9 mm 02:08 2.9 mm, 2021
Maximum 10-min Rain 0.8 mm 01:52 0.8 mm, 2021
Maximum Rain Rate 7 mm/h 01:52 18 mm/h, 2020
Minimum Dew Point 2.6 °C 00:01 1.9 °C 6.9 °C, 2017 -11.5 °C, 2012
Maximum Dew Point 10.0 °C 13:09 6.5 °C 10.3 °C, 2020 -7.9 °C, 2012
Mean Dew Point 7.3 °C 4.7 °C 7.8 °C, 2017 -9.7 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 3.7 °C 00:34 3.2 °C 10.3 °C, 2017 -3.1 °C, 2009
Day Maximum (09-21) 12.4 °C 14:18 8.1 °C 13.0 °C, 2020 0.2 °C, 2009
Max 10m Temp Rise 0.4 °C 07:24 0.3 °C 0.9 °C, 2025 0.2 °C, 2016
Max 1hr Temp Rise 1.9 °C 08:17 1.4 °C 3.0 °C, 2025 0.7 °C, 2016
Max 1hr Hum Rise 3% 19:07 3% 8%, 2012 3%, 2019
Max 10m Temp Fall 0.2 °C 15:17 0.2 °C 0.5 °C, 2010 0.2 °C, 2011
Max 1hr Temp Fall 0.7 °C 17:08 0.6 °C 1.8 °C, 2010 0.6 °C, 2015
Max 1hr Hum Fall 6% 13:24 5% 13%, 2016 3%, 2017
Max 10m Wind Speed 12.9 mph 20:39 9.3 mph 16.0 mph, 2016 6.1 mph, 2015
Minimum Feels-like -0.4 °C 00:19 -0.7 °C 10.3 °C, 2017 -8.7 °C, 2012
Maximum Feels-like 13.6 °C 13:44 8.8 °C 14.0 °C, 2024 -1.8 °C, 2012
Mean Feels-like 8.3 °C 5.2 °C 11.3 °C, 2017 -5.6 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 18 hrs, 2012 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.7 °C (+3.8) 5.0 °C (+0.1) 9.1 °C (+4.2), 2025 1.3 °C (-3.6), 2017
Humidity Range 16% 13% 33%, 2013 7%, 2017
Pressure Range 7 hPa 9 hPa 22 hPa, 2013 2 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1.4 [17%]1.4 hrs (27%) [8.5%] 8.3 [101%], 2025 0 [0%], 2009
Wet Hours 5
[Mean rain rate: 1.1 mm/h]		6 hrs (162%) [13%] 6, 2020 , 2009
Cloud Cover Mostly Cloudy or Partly Cloudy
Events None
Comments o.night rn
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 2.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 2nd February 2021.
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

day graph

Webcam Summary of Cloud Conditions

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose