Daily Report for 11th January 2026

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature -1.8 °C (-4.8) 00:38 -0.9 °C (-4.0) 7.2 °C (+4.2), 2012 -4.4 °C (-7.4), 2025
Maximum Temperature 9.6 °C (+1.8) 23:59 4.6 °C (-3.3) 11.1 °C (+3.3), 2012 0.8 °C (-7.0), 2010
Mean Temperature 4.0 °C (-1.5) 1.7 °C (-3.6) 9.2 °C, 2020 -1.2 °C, 2025
Minimum Humidity 82% 13:41 75% 94%, 2013 42%, 2009
Maximum Humidity 95% 07:47 91% 98%, 2010 76%, 2015
Mean Humidity 91% 84% 97%, 2010 66%, 2009
Minimum Pressure 1003 hPa 23:31 1002 hPa 1033 hPa, 2024 978 hPa, 2016
Maximum Pressure 1023 hPa 00:00 1015 hPa 1039 hPa, 2024 989 hPa, 2016
Mean Pressure 1014 hPa 1009 hPa 1037 hPa, 2024 982 hPa, 2016
Mean Wind Speed 6.3 mph (+1.1) 5.2 mph (-0.0) 10.3 mph, 2020 0.6 mph, 2025
Maximum Wind Speed 20.7 mph 20:36 14.8 mph 21.4 mph, 2017 4.3 mph, 2025
Maximum Gust 33.4 mph 14:59 22.5 mph 36.9 mph, 2020 6.0 mph, 2010
Mean Wind Direction SSW
Rainfall 3.2 mm 32.2 mm (154%) 16.1 mm, 2016
Maximum Hourly Rain 1.6 mm 22:45 8.2 mm, 2016
Maximum 10-min Rain 0.6 mm 22:45 2.1 mm, 2016
Maximum Rain Rate 2.4 mm/h 22:07 42 mm/h, 2016
Minimum Dew Point -2.8 °C 00:18 -3.0 °C 5.1 °C, 2023 -5.4 °C, 2025
Maximum Dew Point 8.7 °C 23:59 2.0 °C 9.5 °C, 2022 0.2 °C, 2010
Mean Dew Point 2.6 °C -0.7 °C 7.9 °C, 2022 -2.2 °C, 2025
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * -2.1 °C * 23:11 -0.6 °C 8.6 °C, 2022 -4.4 °C, 2025
Day Maximum (09-21) * 7.8 °C * 20:56 4.1 °C 11.1 °C, 2012 0.8 °C, 2010
Max 10m Temp Rise 0.6 °C 08:28 0.4 °C 0.6 °C, 2026 0.1 °C, 2010
Max 1hr Temp Rise 2.3 °C 08:35 1.3 °C 2.3 °C, 2025 0.2 °C, 2010
Max 1hr Hum Rise 6% 15:24 5% 12%, 2023 2%, 2010
Max 10m Temp Fall 0.2 °C 15:04 0.3 °C 0.7 °C, 2014 0.1 °C, 2010
Max 1hr Temp Fall 0.4 °C 15:31 1.1 °C 2.4 °C, 2014 0.2 °C, 2010
Max 1hr Hum Fall 5% 09:22 6% 18%, 2011 1%, 2010
Max 10m Wind Speed 13.4 mph 20:39 10.6 mph 16.6 mph, 2023 3.1 mph, 2010
Minimum Feels-like -3.7 °C 01:43 -5.8 °C 4.9 °C, 2022 -6.2 °C, 2025
Maximum Feels-like 7.2 °C 23:53 3.3 °C 11.5 °C, 2012 0.8 °C, 2010
Mean Feels-like 1.3 °C -1.6 °C 8.1 °C, 2022 -1.4 °C, 2025
Air-frost Hrs 7 hrs 7 hrs 18 hrs, 2025 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 11.4 °C (+6.6) 5.5 °C (+0.8) 11.4 °C (+6.6), 2026 0.7 °C (-4.1), 2010
Humidity Range 13% 17% 49%, 2009 3%, 2018
Pressure Range 21 hPa 13 hPa 21 hPa, 2026 2 hPa, 2019
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]35 hrs (150%) [44%] 7 [96%], 2014 0 [0%], 2010
Wet Hours 4
[Mean rain rate: 0.8 mm/h]		27 hrs (114%) [10%] 8, 2016 , 2009
Cloud Cover unknown
Events Air Frost
Comments data is awaiting quality control from site operator
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 11th January 2026.
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

daycamsumFull resolution individual images at up-to 5 minute intervals

Wind rose