Daily Report for 10th January 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 5.1 °C (+2.1) 07:23 5.7 °C (+2.5) 9.0 °C (+6.0), 2012 -3.5 °C (-6.5), 2009
Maximum Temperature 7.2 °C (-0.6) 16:21 9.8 °C (+2.0) 13.8 °C (+6.0), 2015 -2.0 °C (-9.8), 2009
Mean Temperature 6.0 °C (+0.7) 8.1 °C (+2.3) 10.1 °C, 2012 -2.8 °C, 2009
Minimum Humidity 74% 14:04 78% 95%, 2013 48%, 2015
Maximum Humidity 92% 02:05 93% 98%, 2013 83%, 2024
Mean Humidity 82% 86% 97%, 2013 70%, 2015
Minimum Pressure 1010 hPa 00:00 1018 hPa 1032 hPa, 2012 982 hPa, 2016
Maximum Pressure 1031 hPa 21:08 1029 hPa 1034 hPa, 2012 987 hPa, 2016
Mean Pressure 1024 hPa 1024 hPa 1033 hPa, 2012 984 hPa, 2016
Mean Wind Speed 4.8 mph (-0.4) 6.1 mph (+0.9) 10.8 mph, 2015 0.7 mph, 2013
Maximum Wind Speed 11.4 mph 05:35 15.0 mph 25.9 mph, 2015 4.9 mph, 2013
Maximum Gust 19.0 mph 17:30 23.9 mph 36.9 mph, 2015 6.7 mph, 2013
Mean Wind Direction WNW
Rainfall 0.0 mm 8.1 mm (43%) 6.2 mm, 2023
Maximum Hourly Rain n/a 1.7, 2023
Maximum 10-min Rain n/a 0.5, 2015
Maximum Rain Rate n/a 18, 2015
Minimum Dew Point 2.3 °C 10:27 3.7 °C 5.6 °C, 2012 -3.1 °C, 2015
Maximum Dew Point 4.4 °C 02:31 8.0 °C 11.4 °C, 2023 -0.5 °C, 2024
Mean Dew Point 3.1 °C 5.9 °C 7.7 °C, 2012 -3.7 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 5.1 °C 07:23 6.7 °C 12.0 °C, 2015 -3.5 °C, 2009
Day Maximum (09-21) 7.2 °C 16:20 9.6 °C 13.5 °C, 2015 -2.0 °C, 2009
Max 10m Temp Rise 0.2 °C 07:51 0.2 °C 0.5 °C, 2014 0.1 °C, 2010
Max 1hr Temp Rise 0.6 °C 12:10 0.8 °C 2.2 °C, 2014 0.4 °C, 2010
Max 1hr Hum Rise 4% 15:06 5% 8%, 2011 1%, 2013
Max 10m Temp Fall 0.2 °C 06:54 0.4 °C 1.3 °C, 2015 0.1 °C, 2010
Max 1hr Temp Fall 0.6 °C 17:27 0.9 °C 2.8 °C, 2015 0.2 °C, 2021
Max 1hr Hum Fall 4% 10:27 6% 18%, 2015 2%, 2010
Max 10m Wind Speed 8.7 mph 23:44 11.4 mph 18.3 mph, 2015 3.7 mph, 2013
Minimum Feels-like -0.7 °C 01:07 1.6 °C 6.3 °C, 2012 -7.6 °C, 2021
Maximum Feels-like 7.1 °C 15:38 10.3 °C 15.5 °C, 2015 1.5 °C, 2010
Mean Feels-like 3.5 °C 6.7 °C 9.7 °C, 2012 -2.4 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 11 hrs, 2021 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 2.1 °C (-2.7) 4.1 °C (-0.6) 9.8 °C (+5.0), 2015 1.1 °C (-3.7), 2010
Humidity Range 18% 15% 41%, 2015 3%, 2013
Pressure Range 21 hPa 11 hPa 21 hPa, 2020 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.5 [34%]15 hrs (70%) [21%] 7 [96%], 2024 0 [0%], 2009
Wet Hours 09 hrs (42%) [3.8%] 6, 2023 , 2009
Cloud Cover am: Overcast transitioned to Mostly Cloudy
pm: Mostly Sunny
Events None
Comments -
Extra Comments
Issues tip reassigned
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 6.5 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 10th 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