Daily Report for 31st January 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.2 °C (+2.2) 22:14 2.8 °C (-0.2) 8.9 °C (+5.9), 2020 -4.6 °C (-7.6), 2019
Maximum Temperature 8.0 °C (+0.2) 00:22 8.1 °C (+0.3) 13.3 °C (+5.5), 2016 1.7 °C (-6.1), 2012
Mean Temperature 6.4 °C (+1.2) 5.5 °C (+0.0) 10.7 °C, 2020 -0.5 °C, 2019
Minimum Humidity 50% 14:10 77% 89%, 2014 48%, 2009
Maximum Humidity 88% 01:00 92% 98%, 2014 64%, 2009
Mean Humidity 71% 85% 96%, 2014 56%, 2009
Minimum Pressure 1018 hPa 01:47 1022 hPa 1026 hPa, 2024 979 hPa, 2015
Maximum Pressure 1029 hPa 19:43 1031 hPa 1036 hPa, 2024 993 hPa, 2015
Mean Pressure 1024 hPa 1026 hPa 1030 hPa, 2024 984 hPa, 2015
Mean Wind Speed 10.1 mph (+4.9) 4.1 mph (-1.1) 10.1 mph, 2022 2.7 mph, 2011
Maximum Wind Speed 24.6 mph 04:58 12.0 mph 24.6 mph, 2022 8.1 mph, 2010
Maximum Gust 39.9 mph 10:33 19.7 mph 39.9 mph, 2022 11.8 mph, 2011
Mean Wind Direction NW
Rainfall 1.4 mm 16.8 mm (28%) 8.7 mm, 2014
Maximum Hourly Rain 1.2 mm 01:08 2.4 mm, 2014
Maximum 10-min Rain 0.8 mm 00:34 0.9 mm, 2014
Maximum Rain Rate 14 mm/h 00:34 18 mm/h, 2014
Minimum Dew Point -2.2 °C 14:10 0.7 °C 7.0 °C, 2020 -5.6 °C, 2019
Maximum Dew Point 5.8 °C 00:02 5.7 °C 11.4 °C, 2016 -1.0 °C, 2010
Mean Dew Point 1.3 °C 3.2 °C 8.9 °C, 2020 -3.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 5.3 °C * 08:20 3.5 °C 8.9 °C, 2020 -4.6 °C, 2019
Day Maximum (09-21) * 7.8 °C * 13:44 7.9 °C 13.3 °C, 2016 1.7 °C, 2012
Max 10m Temp Rise 0.3 °C 04:17 0.3 °C 0.9 °C, 2014 0.2 °C, 2011
Max 1hr Temp Rise 0.9 °C 09:33 1.2 °C 2.7 °C, 2014 0.4 °C, 2018
Max 1hr Hum Rise 9% 18:54 4% 14%, 2019 1%, 2017
Max 10m Temp Fall 0.8 °C 05:19 0.4 °C 1.2 °C, 2013 0.1 °C, 2017
Max 1hr Temp Fall 1.2 °C 01:21 1.2 °C 2.7 °C, 2018 0.3 °C, 2017
Max 1hr Hum Fall 13% 02:00 6% 16%, 2015 1%, 2017
Max 10m Wind Speed 19.6 mph 05:04 9.2 mph 19.6 mph, 2022 6.4 mph, 2010
Minimum Feels-like -0.9 °C 08:37 -0.4 °C 5.2 °C, 2020 -7.0 °C, 2010
Maximum Feels-like 7.6 °C 00:34 7.9 °C 15.3 °C, 2016 1.5 °C, 2012
Mean Feels-like 2.6 °C 4.1 °C 10.3 °C, 2020 -3.2 °C, 2019
Air-frost Hrs 0 hrs 0.7 hrs 13 hrs, 2010 0 hrs, 2013
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.8 °C (-2.0) 5.3 °C (+0.5) 9.0 °C (+4.2), 2016 2.8 °C (-2.0), 2013
Humidity Range 38% 15% 38%, 2015 2%, 2017
Pressure Range 11 hPa 8 hPa 21 hPa, 2014 1 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [99%]92 hrs (132%) [39%] 8 [99%], 2022 0 [0%], 2012
Wet Hours 2
[Mean rain rate: 0.7 mm/h]		21 hrs (31%) [2.8%] 8, 2014 , 2009
Cloud Cover Sunny
Events Maximum possible sunshine
Comments o.night shs
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 4.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 31st January 2022.
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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