Daily Report for 3rd October 2019

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 3.1 °C (-6.8) 06:15 6.2 °C (-3.7) 16.2 °C (+6.3), 2011 3.1 °C (-6.8), 2019
Maximum Temperature 13.3 °C (-3.1) 15:39 15.1 °C (-1.3) 25.3 °C (+8.9), 2011 13.3 °C (-3.1), 2019
Mean Temperature 8.7 °C (-5.0) 11.0 °C (-2.5) 19.9 °C, 2011 8.7 °C, 2019
Minimum Humidity 67% 12:07 66% 89%, 2013 35%, 2011
Maximum Humidity 97% 09:19 94% 98%, 2010 78%, 2011
Mean Humidity 83% 84% 94%, 2013 59%, 2011
Minimum Pressure 1006 hPa 23:56 1004 hPa 1025 hPa, 2016 983 hPa, 2020
Maximum Pressure 1023 hPa 00:01 1018 hPa 1031 hPa, 2016 990 hPa, 2020
Mean Pressure 1018 hPa 1012 hPa 1029 hPa, 2016 987 hPa, 2020
Mean Wind Speed 2.8 mph (-1.3) 3.7 mph (-0.4) 6.3 mph, 2011 0.8 mph, 2015
Maximum Wind Speed 11.5 mph 16:56 14.5 mph 17.6 mph, 2010 5.6 mph, 2015
Maximum Gust 19.6 mph 16:51 19.9 mph 28.9 mph, 2009 8.1 mph, 2015
Mean Wind Direction S
Rainfall 0.9 mm 18.5 mm (281%) 34.0 mm, 2020
Maximum Hourly Rain 0.7 mm 23:19 7.7 mm, 2012
Maximum 10-min Rain 0.2 mm 23:19 5.4 mm, 2012
Maximum Rain Rate 1.0 mm/h 23:19 76 mm/h, 2012
Minimum Dew Point 2.1 °C 05:43 4.7 °C 12.7 °C, 2013 2.1 °C, 2019
Maximum Dew Point 10.4 °C 23:57 11.6 °C 16.8 °C, 2013 8.8 °C, 2017
Mean Dew Point 5.9 °C 8.2 °C 14.7 °C, 2013 5.4 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 3.1 °C 06:12 7.3 °C 16.2 °C, 2011 3.1 °C, 2019
Day Maximum (09-21) 13.3 °C 16:27 15.1 °C 25.3 °C, 2011 13.3 °C, 2019
Max 10m Temp Rise 0.6 °C 10:51 0.5 °C 0.9 °C, 2011 0.3 °C, 2020
Max 1hr Temp Rise 2.5 °C 11:18 2.0 °C 3.5 °C, 2016 0.9 °C, 2020
Max 1hr Hum Rise 10% 20:50 12% 13%, 2011 2%, 2013
Max 10m Temp Fall 0.3 °C 20:47 0.7 °C 1.4 °C, 2012 0.2 °C, 2010
Max 1hr Temp Fall 1.0 °C 21:21 2.3 °C 3.2 °C, 2016 0.7 °C, 2013
Max 1hr Hum Fall 19% 11:08 14% 19%, 2019 4%, 2013
Max 10m Wind Speed 8.1 mph 16:57 8.4 mph 13.7 mph, 2021 4.2 mph, 2015
Minimum Feels-like 0.2 °C 01:07 4.6 °C 17.9 °C, 2011 0.2 °C, 2019
Maximum Feels-like 13.9 °C 16:18 16.7 °C 27.0 °C, 2011 13.6 °C, 2009
Mean Feels-like 8.9 °C 11.8 °C 21.8 °C, 2011 8.9 °C, 2019
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 10.2 °C (+3.7) 8.9 °C (+2.4) 11.8 °C (+5.3), 2016 3.5 °C (-3.0), 2020
Humidity Range 30% 28% 43%, 2011 9%, 2013
Pressure Range 17 hPa 14 hPa 17 hPa, 2019 3 hPa, 2012
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.5 [5%]11 hrs (95%) [35%] 10.2 [98%], 2016 0 [0%], 2021
Wet Hours 2
[Mean rain rate: 0.5 mm/h]
9 hrs (190%) [13%] 15, 2020 0, 2011
Cloud Cover Overcast with periods of Mostly Cloudy
Events None
Comments late eve Rain
Extra Comments gorgeous sunrise
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 14.0 °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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