Daily Report for 12th January 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 1.9 °C (-1.1) 06:50 3.7 °C (+0.6) 7.9 °C (+4.9), 2015 -0.9 °C (-3.9), 2014
Maximum Temperature 7.7 °C (-0.1) 15:23 9.2 °C (+1.4) 12.5 °C (+4.7), 2012 1.5 °C (-6.3), 2010
Mean Temperature 4.3 °C (-0.6) 6.5 °C (+1.0) 10.2 °C, 2015 0.7 °C, 2010
Minimum Humidity 84% 14:13 79% 87%, 2010 55%, 2013
Maximum Humidity 95% 10:55 93% 98%, 2010 87%, 2017
Mean Humidity 91% 87% 94%, 2014 75%, 2017
Minimum Pressure 1037 hPa 00:03 1010 hPa 1037 hPa, 2022 989 hPa, 2016
Maximum Pressure 1043 hPa 23:52 1021 hPa 1043 hPa, 2022 1008 hPa, 2016
Mean Pressure 1041 hPa 1015 hPa 1041 hPa, 2022 997 hPa, 2016
Mean Wind Speed 0.3 mph (-4.9) 5.3 mph (+0.1) 10.0 mph, 2015 0.3 mph, 2022
Maximum Wind Speed 5.4 mph 14:40 13.5 mph 22.5 mph, 2015 5.4 mph, 2022
Maximum Gust 18.2 mph 01:37 22.7 mph 36.9 mph, 2020 16.1 mph, 2010
Mean Wind Direction NNE
Rainfall 0.0 mm 15.2 mm (67%) 15.9 mm, 2017
Maximum Hourly Rain 0.0 mm 4.6 mm, 2017
Maximum 10-min Rain 0.0 mm 1.0 mm, 2017
Maximum Rain Rate n/a 18, 2017
Minimum Dew Point 0.7 °C 06:45 1.9 °C 4.0 °C, 2019 -4.1 °C, 2013
Maximum Dew Point 5.3 °C 15:23 7.1 °C 11.4 °C, 2011 0.7 °C, 2010
Mean Dew Point 3.0 °C 4.5 °C 8.1 °C, 2011 -0.3 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 1.9 °C 06:53 4.8 °C 9.3 °C, 2020 -0.9 °C, 2014
Day Maximum (09-21) 7.7 °C 15:22 9.0 °C 12.5 °C, 2012 1.5 °C, 2010
Max 10m Temp Rise 0.5 °C 11:47 0.3 °C 0.6 °C, 2014 0.1 °C, 2010
Max 1hr Temp Rise 1.8 °C 12:06 1.2 °C 2.7 °C, 2014 0.4 °C, 2010
Max 1hr Hum Rise 5% 17:29 4% 11%, 2015 2%, 2010
Max 10m Temp Fall 0.5 °C 16:54 0.4 °C 0.8 °C, 2017 0.1 °C, 2010
Max 1hr Temp Fall 2.0 °C 17:20 1.4 °C 3.1 °C, 2017 0.3 °C, 2010
Max 1hr Hum Fall 7% 12:47 5% 16%, 2013 2%, 2011
Max 10m Wind Speed 3.0 mph 14:48 10.4 mph 14.9 mph, 2020 3.0 mph, 2022
Minimum Feels-like 0.2 °C 01:37 0.3 °C 3.9 °C, 2019 -4.9 °C, 2017
Maximum Feels-like 7.7 °C 15:16 9.0 °C 14.0 °C, 2011 1.4 °C, 2010
Mean Feels-like 4.1 °C 4.9 °C 9.4 °C, 2015 -1.8 °C, 2010
Air-frost Hrs 0 hrs 0.9 hrs 9 hrs, 2014 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.8 °C (+1.0) 5.5 °C (+0.8) 10.2 °C (+5.4), 2014 1.1 °C (-3.7), 2010
Humidity Range 11% 13% 43%, 2013 9%, 2021
Pressure Range 6 hPa 11 hPa 22 hPa, 2017 4 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 6.5 [89%]29 hrs (115%) [34%] 6.5 [89%], 2022 0 [0%], 2009
Wet Hours 018 hrs (69%) [6.3%] 10, 2011 , 2009
Cloud Cover Sunny
Events None
Comments -
Extra Comments delayed tip removed
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 5.0 °C
Notes
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 initially pulled from the official weather station at Heathrow, and later adjusted by hand to reflect local conditions based on webcam observations. Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually. Cloud cover and Events are manually reported, often with multi-week delays.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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