Daily Report for 1st October 2009

<<Previous Day
Reset
Next Day>>
Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.9 °C (-0.2) 23:59 9.9 °C (-0.1) 15.2 °C (+5.1), 2014 7.2 °C (-2.9), 2018
Maximum Temperature 16.3 °C (-0.3) 15:06 16.3 °C (-0.2) 27.1 °C (+10.5), 2011 15.1 °C (-1.5), 2018
Mean Temperature 13.9 °C (-0.3) 13.9 °C (-0.2) 19.3 °C, 2011 11.1 °C, 2018
Minimum Humidity 52% 17:27 52% 83%, 2010 40%, 2011
Maximum Humidity 82% 07:48 82% 98%, 2010 82%, 2009
Mean Humidity 68% 68% 91%, 2010 66%, 2018
Minimum Pressure 1016 hPa 03:31 1016 hPa 1029 hPa, 2015 993 hPa, 2020
Maximum Pressure 1021 hPa 22:11 1021 hPa 1033 hPa, 2015 1001 hPa, 2020
Mean Pressure 1018 hPa 1018 hPa 1031 hPa, 2015 998 hPa, 2020
Mean Wind Speed 3.6 mph (-0.5) 3.6 mph (-0.5) 7.2 mph, 2017 1.2 mph, 2011
Maximum Wind Speed 10.5 mph 10.5 mph 17.2 mph, 2019 8.1 mph, 2011
Maximum Gust 15.2 mph 09:08 15.2 mph 29.1 mph, 2010 10.0 mph, 2011
Mean Wind Direction NW
Rainfall 0.0 mm 0.0 mm (0%) 17.6 mm, 2019
Maximum Hourly Rain n/a 10.8, 2019
Maximum 10-min Rain n/a 7, 2019
Maximum Rain Rate n/a 92, 2019
Minimum Dew Point 4.1 °C 23:56 4.1 °C 12.2 °C, 2017 2.7 °C, 2018
Maximum Dew Point 11.9 °C 00:34 11.9 °C 16.1 °C, 2011 6.4 °C, 2018
Mean Dew Point 7.9 °C 7.9 °C 14.2 °C, 2017 4.7 °C, 2018
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 12.8 °C * 12.8 °C 15.2 °C, 2014 7.2 °C, 2018
Day Maximum (09-21) 16.3 °C 16.3 °C 27.1 °C, 2011 14.8 °C, 2010
Max 10m Temp Rise n/a 13:22 0.0 °C 0.9, 2011 0.2, 2010
Max 1hr Temp Rise n/a 13:45 0.0 °C 4.4, 2011 0.6, 2010
Max 1hr Hum Rise n/a 20:39 0% 15, 2019 4, 2010
Max 10m Temp Fall n/a 20:22 0.0 °C 1.2, 2019 0.2, 2010
Max 1hr Temp Fall n/a 20:42 0.0 °C 3.4, 2019 0.3, 2017
Max 1hr Hum Fall n/a 09:50 0% 20, 2014 4, 2010
Max 10m Wind Speed 7.2 mph 09:53 7.2 mph 11.5 mph, 2017 6.0 mph, 2011
Minimum Feels-like 9.9 °C 23:59 9.9 °C 18.1 °C, 2014 4.5 °C, 2018
Maximum Feels-like 17.3 °C 00:54 17.3 °C 30.2 °C, 2011 15.1 °C, 2018
Mean Feels-like 14.5 °C 14.5 °C 21.8 °C, 2011 10.3 °C, 2018
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.4 °C (-0.2) 6.4 °C (-0.1) 14.8 °C (+8.2), 2011 3.0 °C (-3.6), 2010
Humidity Range 30% 30% 54%, 2011 15%, 2010
Pressure Range 5 hPa 5 hPa 13 hPa, 2010 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7.5 [71%]7.5 hrs (195%) [72%] 10.3 [98%], 2011 0 [0%], 2010
Wet Hours 00 hrs (0%) [0%] 9, 2010 0, 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? No
Pond Temperature (Heath) 0.0 °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.
View monthly summary

Daily Graph of Conditions

daygraph daygraph 2 daygraph-wdir

Webcam Summary of Cloud Conditions


Webcam summary not available for this day

Wind rose