Daily Report for 16th January 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 4.2 °C (+1.2) 23:55 3.1 °C (+0.0) 9.8 °C (+6.8), 2011 -3.4 °C (-6.4), 2013
Maximum Temperature 8.3 °C (+0.5) 15:11 8.7 °C (+0.9) 12.3 °C (+4.5), 2011 -0.8 °C (-8.6), 2013
Mean Temperature 6.2 °C (+0.8) 5.9 °C (+0.5) 11.1 °C, 2011 -2.4 °C, 2013
Minimum Humidity 82% 22:11 80% 90%, 2010 51%, 2012
Maximum Humidity 96% 10:44 94% 98%, 2010 83%, 2015
Mean Humidity 90% 88% 96%, 2010 69%, 2015
Minimum Pressure 1024 hPa 01:45 1015 hPa 1026 hPa, 2016 986 hPa, 2014
Maximum Pressure 1036 hPa 23:41 1025 hPa 1036 hPa, 2022 992 hPa, 2014
Mean Pressure 1028 hPa 1020 hPa 1028 hPa, 2016 989 hPa, 2014
Mean Wind Speed 1.7 mph (-3.5) 4.2 mph (-1.0) 9.1 mph, 2018 1.0 mph, 2017
Maximum Wind Speed 8.4 mph 12:48 11.7 mph 22.8 mph, 2018 5.0 mph, 2017
Maximum Gust 12.5 mph 13:33 19.4 mph 36.9 mph, 2018 7.1 mph, 2013
Mean Wind Direction NW
Rainfall 0.0 mm 15.4 mm (51%) 9.4 mm, 2014
Maximum Hourly Rain n/a 2.7, 2014
Maximum 10-min Rain n/a 1.9, 2014
Maximum Rain Rate n/a 36, 2014
Minimum Dew Point 1.9 °C 23:54 1.4 °C 6.0 °C, 2011 -4.7 °C, 2013
Maximum Dew Point 6.4 °C 14:18 6.5 °C 9.7 °C, 2011 -1.2 °C, 2013
Mean Dew Point 4.6 °C 4.1 °C 8.4 °C, 2011 -3.0 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 4.5 °C * 21:00 4.0 °C 10.3 °C, 2011 -3.4 °C, 2013
Day Maximum (09-21) 8.3 °C 15:09 8.6 °C 12.3 °C, 2011 -0.8 °C, 2013
Max 10m Temp Rise 0.4 °C 14:53 0.4 °C 0.5 °C, 2012 0.2 °C, 2010
Max 1hr Temp Rise 0.9 °C 15:03 1.2 °C 1.8 °C, 2012 0.4 °C, 2017
Max 1hr Hum Rise 3% 02:42 4% 11%, 2014 1%, 2017
Max 10m Temp Fall 0.4 °C 21:39 0.4 °C 1.1 °C, 2015 0.2 °C, 2010
Max 1hr Temp Fall 1.5 °C 22:07 1.4 °C 3.5 °C, 2019 0.8 °C, 2011
Max 1hr Hum Fall 10% 15:22 6% 17%, 2012 2%, 2013
Max 10m Wind Speed 6.8 mph 12:35 9.1 mph 15.6 mph, 2018 3.8 mph, 2013
Minimum Feels-like 2.2 °C 01:08 0.2 °C 8.3 °C, 2011 -6.7 °C, 2013
Maximum Feels-like 8.3 °C 15:13 8.6 °C 13.0 °C, 2020 -0.8 °C, 2013
Mean Feels-like 5.4 °C 4.6 °C 11.7 °C, 2011 -3.2 °C, 2013
Air-frost Hrs 0 hrs 0.7 hrs 24 hrs, 2013 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.1 °C (-0.7) 5.6 °C (+0.9) 5.7 °C (+0.9), 2012 2.5 °C (-2.3), 2011
Humidity Range 14% 14% 39%, 2012 5%, 2017
Pressure Range 12 hPa 10 hPa 15 hPa, 2015 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3 [40%]48 hrs (139%) [41%] 7.5 [100%], 2012 0 [0%], 2010
Wet Hours 019 hrs (53%) [4.8%] 8, 2017 , 2009
Cloud Cover am: Overcast
pm: Sunny
Events Dense Fog
Comments dense fog til 10
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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Webcam Summary of Cloud Conditions

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