Daily Report for 26th January 2011

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 1.7 °C (-1.2) 23:44 3.4 °C (+0.3) 6.8 °C (+3.9), 2019 -1.8 °C (-4.7), 2010
Maximum Temperature 7.0 °C (-0.8) 00:12 7.7 °C (-0.1) 12.4 °C (+4.6), 2024 0.4 °C (-7.4), 2017
Mean Temperature 5.2 °C (-1.0) 5.8 °C (+0.1) 9.6 °C, 2016 -0.4 °C, 2017
Minimum Humidity 77% 23:59 78% 84%, 2021 58%, 2015
Maximum Humidity 97% 07:20 95% 97%, 2011 82%, 2017
Mean Humidity 92% 88% 92%, 2011 76%, 2017
Minimum Pressure 1008 hPa 04:44 1014 hPa 1038 hPa, 2010 986 hPa, 2019
Maximum Pressure 1018 hPa 23:03 1022 hPa 1042 hPa, 2010 1007 hPa, 2009
Mean Pressure 1013 hPa 1018 hPa 1040 hPa, 2010 998 hPa, 2009
Mean Wind Speed 6.3 mph (+1.1) 5.3 mph (+0.1) 10.8 mph, 2016 2.2 mph, 2018
Maximum Wind Speed 19.9 mph 13.5 mph 23.2 mph, 2016 7.6 mph, 2018
Maximum Gust 30.6 mph 23:13 19.4 mph 38.4 mph, 2016 11.0 mph, 2009
Mean Wind Direction NNE
Rainfall 0.5 mm 73.0 mm (148%) 5.7 mm, 2019
Maximum Hourly Rain 0.3 mm 16:31 5.3 mm, 2019
Maximum 10-min Rain n/a 16:31 2.9, 2019
Maximum Rain Rate n/a 53, 2019
Minimum Dew Point -1.9 °C 23:58 1.2 °C 5.4 °C, 2019 -5.2 °C, 2017
Maximum Dew Point 6.3 °C 00:18 6.2 °C 11.4 °C, 2024 -2.5 °C, 2017
Mean Dew Point 4.0 °C 3.9 °C 7.3 °C, 2016 -4.2 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 5.9 °C * 05:50 4.3 °C 7.7 °C, 2015 -0.3 °C, 2021
Day Maximum (09-21) * 6.7 °C * 13:38 7.4 °C 11.5 °C, 2016 0.4 °C, 2017
Max 10m Temp Rise 0.1 °C 09:38 0.2 °C 0.5 °C, 2018 0.1 °C, 2011
Max 1hr Temp Rise 0.5 °C 13:24 0.9 °C 1.7 °C, 2018 0.4 °C, 2017
Max 1hr Hum Rise 6% 20:57 5% 13%, 2012 2%, 2017
Max 10m Temp Fall 0.4 °C 15:36 0.3 °C 0.8 °C, 2012 0.2 °C, 2010
Max 1hr Temp Fall 1.5 °C 16:09 0.9 °C 2.6 °C, 2012 0.6 °C, 2015
Max 1hr Hum Fall 9% 23:26 6% 19%, 2014 2%, 2017
Max 10m Wind Speed 12.4 mph 15:27 9.0 mph 18.1 mph, 2016 5.3 mph, 2018
Minimum Feels-like -5.1 °C 23:14 0.3 °C 3.6 °C, 2016 -6.4 °C, 2017
Maximum Feels-like 7.0 °C 00:00 7.9 °C 14.3 °C, 2024 0.0 °C, 2017
Mean Feels-like 2.7 °C 4.4 °C 9.0 °C, 2016 -3.8 °C, 2017
Air-frost Hrs 0 hrs 0.1 hrs 12 hrs, 2017 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.3 °C (+0.5) 4.3 °C (-0.4) 8.5 °C (+3.7), 2024 2.1 °C (-2.7), 2017
Humidity Range 20% 17% 35%, 2015 10%, 2023
Pressure Range 10 hPa 8 hPa 28 hPa, 2019 3 hPa, 2023
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]33 hrs (57%) [17%] 7.9 [100%], 2024 0 [0%], 2011
Wet Hours 2.5
[Mean rain rate: 0.2 mm/h]		62 hrs (110%) [9.9%] 6, 2013 , 2009
Cloud Cover Overcast
Events None
Comments 10, 11 Light Drizzle; 14-17, 20-21 Light Showers
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 26th January 2011.
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

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Webcam Summary of Cloud Conditions

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Wind rose