Daily Report for 29th January 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 2.6 °C (-0.4) 03:55 4.7 °C (+1.7) 9.6 °C (+6.6), 2013 -0.8 °C (-3.8), 2019
Maximum Temperature 9.1 °C (+1.3) 15:41 9.3 °C (+1.5) 13.5 °C (+5.7), 2013 1.3 °C (-6.5), 2011
Mean Temperature 5.7 °C (+0.5) 7.1 °C (+1.6) 11.6 °C, 2013 0.7 °C, 2011
Minimum Humidity 72% 15:40 78% 91%, 2014 64%, 2015
Maximum Humidity 88% 22:30 92% 98%, 2010 77%, 2011
Mean Humidity 82% 87% 95%, 2014 74%, 2011
Minimum Pressure 1004 hPa 00:01 1016 hPa 1028 hPa, 2012 976 hPa, 2015
Maximum Pressure 1012 hPa 20:42 1027 hPa 1034 hPa, 2022 999 hPa, 2014
Mean Pressure 1010 hPa 1021 hPa 1030 hPa, 2012 985 hPa, 2015
Mean Wind Speed 7.6 mph (+2.4) 5.8 mph (+0.6) 12.0 mph, 2016 2.9 mph, 2012
Maximum Wind Speed 16.6 mph 12:07 14.9 mph 23.2 mph, 2016 8.5 mph, 2012
Maximum Gust 23.0 mph 12:07 23.5 mph 33.1 mph, 2013 10.5 mph, 2012
Mean Wind Direction WSW
Rainfall 0.0 mm 43.6 mm (79%) 14.0 mm, 2017
Maximum Hourly Rain n/a 4.3, 2017
Maximum 10-min Rain n/a 1.1, 2017
Maximum Rain Rate n/a 10.8, 2017
Minimum Dew Point 0.5 °C 01:31 2.9 °C 7.9 °C, 2024 -4.6 °C, 2010
Maximum Dew Point 5.9 °C 23:38 7.2 °C 12.3 °C, 2013 -2.8 °C, 2011
Mean Dew Point 2.8 °C 5.0 °C 10.2 °C, 2013 -3.3 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 2.6 °C 04:17 5.4 °C 10.4 °C, 2018 -0.8 °C, 2019
Day Maximum (09-21) 9.1 °C 15:41 9.0 °C 13.5 °C, 2013 1.3 °C, 2011
Max 10m Temp Rise 0.4 °C 10:32 0.3 °C 0.5 °C, 2017 0.1 °C, 2011
Max 1hr Temp Rise 1.9 °C 11:00 1.0 °C 1.9 °C, 2017 0.3 °C, 2014
Max 1hr Hum Rise 5% 19:10 5% 12%, 2015 1%, 2024
Max 10m Temp Fall 0.2 °C 16:30 0.4 °C 0.9 °C, 2015 0.1 °C, 2011
Max 1hr Temp Fall 0.8 °C 16:58 1.1 °C 2.9 °C, 2019 0.3 °C, 2011
Max 1hr Hum Fall 7% 11:03 5% 16%, 2022 1%, 2011
Max 10m Wind Speed 12.5 mph 12:53 11.2 mph 17.3 mph, 2016 6.4 mph, 2012
Minimum Feels-like -2.4 °C 04:55 1.0 °C 7.1 °C, 2024 -6.0 °C, 2010
Maximum Feels-like 7.8 °C 16:07 9.5 °C 15.7 °C, 2013 1.2 °C, 2011
Mean Feels-like 2.1 °C 5.4 °C 12.6 °C, 2013 -2.8 °C, 2011
Air-frost Hrs 0 hrs 0.3 hrs 4 hrs, 2019 0 hrs, 2012
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.5 °C (+1.8) 4.5 °C (-0.2) 9.2 °C (+4.5), 2018 1.4 °C (-3.3), 2011
Humidity Range 16% 14% 31%, 2010 4%, 2011
Pressure Range 9 hPa 11 hPa 23 hPa, 2015 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 8 [100%]67 hrs (104%) [31%] 8 [100%], 2020 0 [0%], 2011
Wet Hours 057 hrs (90%) [8.1%] 17, 2014 , 2009
Cloud Cover Sunny with periods of Mostly Sunny
Events Maximum possible sunshine
Comments -
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 29th January 2020.
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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Wind rose