Daily Report for 15th August 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.6 °C (+2.2) 02:18 14.7 °C (+1.1) 17.4 °C (+4.0), 2012 11.5 °C (-1.9), 2016
Maximum Temperature 22.4 °C (+0.0) 17:12 22.5 °C (-0.0) 24.0 °C (+1.6), 2017 19.9 °C (-2.5), 2015
Mean Temperature 18.5 °C (+1.1) 18.3 °C (+0.6) 19.6 °C, 2018 15.8 °C, 2014
Minimum Humidity 65% 17:21 58% 90%, 2020 41%, 2011
Maximum Humidity 87% 13:07 92% 97%, 2010 76%, 2011
Mean Humidity 78% 77% 93%, 2020 58%, 2017
Minimum Pressure 1013 hPa 18:42 1015 hPa 1022 hPa, 2016 1002 hPa, 2012
Maximum Pressure 1015 hPa 00:36 1019 hPa 1025 hPa, 2016 1011 hPa, 2012
Mean Pressure 1014 hPa 1017 hPa 1023 hPa, 2016 1006 hPa, 2012
Mean Wind Speed 5.6 mph (+1.6) 3.3 mph (-0.7) 6.9 mph, 2019 2.0 mph, 2020
Maximum Wind Speed 12.7 mph 9.0 mph 17.0 mph, 2012 8.3 mph, 2020
Maximum Gust 19.9 mph 11:49 13.1 mph 27.6 mph, 2019 11.8 mph, 2014
Mean Wind Direction SW
Rainfall 0.0 mm 37.8 mm (147%) 6.0 mm, 2020
Maximum Hourly Rain n/a 4, 2020
Maximum 10-min Rain n/a 2, 2020
Maximum Rain Rate n/a 40, 2020
Minimum Dew Point 13.2 °C 00:35 11.2 °C 15.9 °C, 2020 5.7 °C, 2015
Maximum Dew Point 15.9 °C 17:01 16.3 °C 19.0 °C, 2020 11.5 °C, 2011
Mean Dew Point 14.6 °C 13.9 °C 17.3 °C, 2020 8.7 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.6 °C 14.8 °C 17.4 °C, 2012 11.5 °C, 2016
Day Maximum (09-21) 22.4 °C 22.5 °C 24.0 °C, 2017 19.9 °C, 2015
Max 10m Temp Rise n/a 14:28 0.5 °C 0.8, 2011 0.2, 2020
Max 1hr Temp Rise n/a 15:11 1.4 °C 3.5, 2016 0.8, 2020
Max 1hr Hum Rise n/a 12:48 7% 15, 2013 3, 2020
Max 10m Temp Fall n/a 14:18 0.5 °C 1.1, 2013 0.2, 2020
Max 1hr Temp Fall n/a 14:11 1.3 °C 2.9, 2015 0.4, 2020
Max 1hr Hum Fall n/a 15:11 7% 16, 2015 3, 2020
Max 10m Wind Speed 9.1 mph 12:00 6.3 mph 12.5 mph, 2012 5.1 mph, 2020
Minimum Feels-like 18.6 °C 02:10 16.1 °C 21.4 °C, 2020 11.6 °C, 2015
Maximum Feels-like 26.8 °C 17:00 24.9 °C 28.8 °C, 2018 21.2 °C, 2015
Mean Feels-like 22.2 °C 20.3 °C 24.0 °C, 2020 17.4 °C, 2015
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.8 °C (-2.2) 7.8 °C (-1.1) 11.6 °C (+2.6), 2016 3.6 °C (-5.4), 2020
Humidity Range 22% 35% 49%, 2015 5%, 2020
Pressure Range 2 hPa 4 hPa 11 hPa, 2014 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4 [30%]63 hrs (69%) [31%] 13 [97%], 2016 0 [0%], 2020
Wet Hours 014 hrs (75%) [3.8%] 3, 2020 0, 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
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

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Webcam Summary of Cloud Conditions


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Wind rose