Daily Report for 20th August 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.7 °C (+2.6) 15:21 14.7 °C (+1.2) 18.4 °C (+5.3), 2018 8.6 °C (-4.5), 2014
Maximum Temperature 21.9 °C (-0.3) 17:39 22.9 °C (+0.5) 24.9 °C (+2.7), 2012 18.9 °C (-3.3), 2014
Mean Temperature 18.9 °C (+1.1) 18.4 °C (+0.8) 21.7 °C, 2018 13.8 °C, 2014
Minimum Humidity 45% 17:45 54% 72%, 2010 34%, 2013
Maximum Humidity 90% 07:24 92% 94%, 2020 80%, 2013
Mean Humidity 70% 75% 84%, 2015 56%, 2013
Minimum Pressure 1010 hPa 08:11 1015 hPa 1026 hPa, 2013 1000 hPa, 2020
Maximum Pressure 1018 hPa 23:20 1018 hPa 1028 hPa, 2013 1005 hPa, 2020
Mean Pressure 1014 hPa 1017 hPa 1027 hPa, 2013 1004 hPa, 2020
Mean Wind Speed 5.4 mph (+1.4) 3.6 mph (-0.4) 13.5 mph, 2016 2.3 mph, 2013
Maximum Wind Speed 16.5 mph 9.7 mph 26.4 mph, 2016 7.8 mph, 2013
Maximum Gust 24.4 mph 13:46 14.2 mph 45.2 mph, 2016 10.2 mph, 2013
Mean Wind Direction SW
Rainfall 0.0 mm 37.8 mm (111%) 4.6 mm, 2011
Maximum Hourly Rain n/a 3.6, 2011
Maximum 10-min Rain n/a 1.4, 2011
Maximum Rain Rate n/a 15, 2011
Minimum Dew Point 8.6 °C 21:20 11.0 °C 15.6 °C, 2018 2.6 °C, 2014
Maximum Dew Point 16.8 °C 11:51 16.1 °C 19.2 °C, 2020 8.6 °C, 2014
Mean Dew Point 12.9 °C 13.6 °C 16.6 °C, 2018 5.3 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.7 °C 14.7 °C 18.4 °C, 2018 8.6 °C, 2014
Day Maximum (09-21) 21.9 °C 22.9 °C 24.9 °C, 2012 18.9 °C, 2014
Max 10m Temp Rise 0.5 °C 08:01 0.5 °C 0.7 °C, 2013 0.4 °C, 2010
Max 1hr Temp Rise 2.3 °C 08:37 1.4 °C 2.9 °C, 2013 1.2 °C, 2010
Max 1hr Hum Rise 10% 22:16 6% 12%, 2011 4%, 2010
Max 10m Temp Fall 0.4 °C 15:10 0.5 °C 0.8 °C, 2016 0.2 °C, 2010
Max 1hr Temp Fall 1.2 °C 21:31 1.2 °C 3.2 °C, 2013 0.4 °C, 2010
Max 1hr Hum Fall 12% 16:24 7% 15%, 2013 2%, 2010
Max 10m Wind Speed 11.0 mph 14:23 6.7 mph 21.9 mph, 2016 6.3 mph, 2013
Minimum Feels-like 16.9 °C 23:55 16.1 °C 22.7 °C, 2018 6.9 °C, 2014
Maximum Feels-like 26.3 °C 11:50 25.5 °C 31.1 °C, 2018 18.9 °C, 2014
Mean Feels-like 21.7 °C 20.6 °C 26.7 °C, 2018 13.8 °C, 2014
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.2 °C (-2.9) 8.3 °C (-0.7) 13.1 °C (+4.0), 2013 4.2 °C (-4.9), 2010
Humidity Range 45% 37% 50%, 2020 16%, 2010
Pressure Range 8 hPa 4 hPa 8 hPa, 2009 2 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4 [31%]95 hrs (79%) [35%] 11 [84%], 2020 0.2 [2%], 2015
Wet Hours 014 hrs (56%) [2.9%] 4, 2017 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, Wet hrs, Cloud cover and Events are based on manual equipment/observations (entered with a delay of 1-10 days); their reliablity is questionable and they are provided for interest only.
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Daily Graph of Conditions

daygraph daygraph 2 daygraph-wdir

Webcam Summary of Cloud Conditions


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Wind rose