Daily Report for 13th January 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 0.4 °C (-2.6) 07:45 3.4 °C (+0.3) 11.4 °C (+8.4), 2011 -0.5 °C (-3.5), 2013
Maximum Temperature 7.7 °C (-0.1) 14:52 9.1 °C (+1.2) 13.3 °C (+5.5), 2011 0.6 °C (-7.2), 2010
Mean Temperature 3.9 °C (-1.4) 6.3 °C (+0.8) 12.1 °C, 2011 0.3 °C, 2010
Minimum Humidity 75% 14:49 79% 90%, 2011 57%, 2017
Maximum Humidity 97% 10:04 93% 98%, 2010 78%, 2013
Mean Humidity 88% 88% 95%, 2011 70%, 2017
Minimum Pressure 1040 hPa 23:17 1012 hPa 1040 hPa, 2022 996 hPa, 2020
Maximum Pressure 1043 hPa 00:23 1022 hPa 1043 hPa, 2022 1001 hPa, 2010
Mean Pressure 1042 hPa 1017 hPa 1042 hPa, 2022 1000 hPa, 2010
Mean Wind Speed 0.9 mph (-4.3) 5.0 mph (-0.2) 9.4 mph, 2020 0.9 mph, 2021
Maximum Wind Speed 6.0 mph 14:29 12.9 mph 25.0 mph, 2020 6.0 mph, 2022
Maximum Gust 8.0 mph 12:07 21.6 mph 41.5 mph, 2020 8.0 mph, 2022
Mean Wind Direction SSE
Rainfall 0.0 mm 15.2 mm (61%) 6.6 mm, 2015
Maximum Hourly Rain n/a 4.1, 2015
Maximum 10-min Rain n/a 1.7, 2015
Maximum Rain Rate n/a 42, 2015
Minimum Dew Point -0.5 °C 07:44 1.7 °C 10.5 °C, 2011 -4.4 °C, 2013
Maximum Dew Point 4.5 °C 13:23 6.9 °C 12.0 °C, 2011 -0.5 °C, 2017
Mean Dew Point 2.1 °C 4.3 °C 11.3 °C, 2011 -2.7 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 0.4 °C 07:46 4.5 °C 11.4 °C, 2011 -0.4 °C, 2010
Day Maximum (09-21) 7.7 °C 14:52 8.9 °C 13.3 °C, 2011 0.6 °C, 2010
Max 10m Temp Rise 0.4 °C 09:58 0.3 °C 0.5 °C, 2017 0.1 °C, 2010
Max 1hr Temp Rise 1.7 °C 10:13 1.2 °C 2.1 °C, 2017 0.3 °C, 2010
Max 1hr Hum Rise 5% 20:40 4% 14%, 2017 2%, 2011
Max 10m Temp Fall 0.4 °C 23:04 0.4 °C 1.2 °C, 2020 0.1 °C, 2010
Max 1hr Temp Fall 1.4 °C 23:04 1.4 °C 3.0 °C, 2020 0.2 °C, 2010
Max 1hr Hum Fall 7% 13:30 5% 12%, 2019 1%, 2010
Max 10m Wind Speed 4.5 mph 14:38 10.0 mph 18.1 mph, 2020 4.5 mph, 2022
Minimum Feels-like 0.0 °C 04:23 0.3 °C 12.8 °C, 2011 -5.7 °C, 2017
Maximum Feels-like 7.5 °C 15:26 8.9 °C 15.6 °C, 2011 0.6 °C, 2010
Mean Feels-like 3.5 °C 4.8 °C 14.0 °C, 2011 -2.1 °C, 2017
Air-frost Hrs 0 hrs 0.8 hrs 5 hrs, 2010 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 7.3 °C (+2.5) 5.6 °C (+0.9) 9.2 °C (+4.4), 2021 1.0 °C (-3.8), 2010
Humidity Range 22% 14% 29%, 2012 7%, 2018
Pressure Range 4 hPa 10 hPa 25 hPa, 2020 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7.4 [100%]37 hrs (132%) [39%] 7.4 [100%], 2022 0 [0%], 2010
Wet Hours 018 hrs (64%) [5.8%] 10, 2021 , 2009
Cloud Cover Sunny
Events Maximum possible sunshine
Comments -
Extra Comments
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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Wind rose