Daily Report for 8th October 2019

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 10.6 °C (+1.0) 23:47 9.0 °C (-0.7) 15.3 °C (+5.7), 2010 6.0 °C (-3.6), 2009
Maximum Temperature 16.3 °C (+0.5) 14:41 15.4 °C (-0.7) 20.0 °C (+4.2), 2010 11.8 °C (-4.0), 2012
Mean Temperature 13.4 °C (+0.8) 12.3 °C (-0.7) 16.6 °C, 2013 9.9 °C, 2009
Minimum Humidity 69% 15:28 69% 88%, 2012 56%, 2009
Maximum Humidity 95% 00:28 95% 98%, 2012 81%, 2016
Mean Humidity 86% 85% 95%, 2012 75%, 2016
Minimum Pressure 1005 hPa 15:30 1006 hPa 1029 hPa, 2021 992 hPa, 2014
Maximum Pressure 1010 hPa 00:00 1016 hPa 1032 hPa, 2021 1003 hPa, 2014
Mean Pressure 1008 hPa 1011 hPa 1030 hPa, 2021 996 hPa, 2014
Mean Wind Speed 6.0 mph (+1.9) 4.2 mph (+0.1) 6.0 mph, 2019 0.7 mph, 2021
Maximum Wind Speed 16.5 mph 13:10 14.2 mph 18.1 mph, 2020 6.5 mph, 2021
Maximum Gust 25.3 mph 15:49 20.7 mph 28.9 mph, 2014 9.1 mph, 2021
Mean Wind Direction SW
Rainfall 4.8 mm 41.4 mm (236%) 7.8 mm, 2020
Maximum Hourly Rain 4.6 mm 16:16 4.6 mm, 2019
Maximum 10-min Rain 2.6 mm 15:59 2.6 mm, 2019
Maximum Rain Rate 26 mm/h 15:50 30 mm/h, 2020
Minimum Dew Point 8.2 °C 23:47 7.2 °C 13.0 °C, 2010 3.8 °C, 2009
Maximum Dew Point 14.0 °C 00:00 12.4 °C 17.1 °C, 2010 9.2 °C, 2009
Mean Dew Point 11.1 °C 9.8 °C 14.6 °C, 2010 6.4 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 12.1 °C * 07:44 9.6 °C 14.5 °C, 2010 6.0 °C, 2009
Day Maximum (09-21) 16.3 °C 15:08 15.4 °C 20.0 °C, 2010 11.8 °C, 2012
Max 10m Temp Rise 0.5 °C 10:25 0.4 °C 0.7 °C, 2015 0.2 °C, 2011
Max 1hr Temp Rise 1.9 °C 10:25 1.6 °C 2.9 °C, 2015 0.7 °C, 2012
Max 1hr Hum Rise 19% 16:28 10% 19%, 2019 3%, 2012
Max 10m Temp Fall 1.8 °C 15:56 0.6 °C 1.8 °C, 2019 0.1 °C, 2012
Max 1hr Temp Fall 3.6 °C 16:32 1.9 °C 3.6 °C, 2019 0.2 °C, 2012
Max 1hr Hum Fall 9% 11:05 11% 14%, 2014 2%, 2012
Max 10m Wind Speed 12.4 mph 13:10 9.6 mph 14.5 mph, 2014 4.4 mph, 2021
Minimum Feels-like 11.1 °C 23:34 8.9 °C 18.5 °C, 2010 4.7 °C, 2018
Maximum Feels-like 18.3 °C 15:41 17.4 °C 24.5 °C, 2010 13.7 °C, 2012
Mean Feels-like 15.3 °C 13.7 °C 20.2 °C, 2010 10.0 °C, 2009
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.7 °C (-0.5) 6.4 °C (+0.1) 9.9 °C (+3.7), 2014 3.3 °C (-2.9), 2012
Humidity Range 26% 26% 41%, 2009 10%, 2012
Pressure Range 5 hPa 10 hPa 12 hPa, 2020 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 3.5 [35%]22 hrs (72%) [26%] 8 [80%], 2009 0 [0%], 2012
Wet Hours 1
[Mean rain rate: 4.8 mm/h]
24 hrs (190%) [13%] 7, 2012 0, 2009
Cloud Cover am: Mostly Sunny transitioned to Overcast
pm: Partly Cloudy
Events None
Comments heavy pm sh
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 13.0 °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