Daily Report for 17th September 2020

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.1 °C (+1.1) 07:24 11.9 °C (+0.3) 17.3 °C (+6.3), 2018 7.4 °C (-3.6), 2010
Maximum Temperature 21.1 °C (+2.8) 14:29 21.9 °C (+2.3) 24.8 °C (+6.5), 2018 13.4 °C (-4.9), 2013
Mean Temperature 16.0 °C (+2.0) 16.8 °C (+1.3) 20.3 °C, 2018 11.1 °C, 2013
Minimum Humidity 44% 17:31 55% 79%, 2016 36%, 2018
Maximum Humidity 86% 07:26 90% 95%, 2013 84%, 2009
Mean Humidity 71% 75% 86%, 2014 65%, 2012
Minimum Pressure 1027 hPa 18:06 1020 hPa 1027 hPa, 2020 987 hPa, 2015
Maximum Pressure 1031 hPa 01:16 1024 hPa 1031 hPa, 2020 1005 hPa, 2013
Mean Pressure 1029 hPa 1022 hPa 1029 hPa, 2020 999 hPa, 2015
Mean Wind Speed 4.0 mph (+0.1) 2.8 mph (-1.1) 8.3 mph, 2016 2.2 mph, 2017
Maximum Wind Speed 11.5 mph 15:11 10.4 mph 20.5 mph, 2016 8.1 mph, 2014
Maximum Gust 21.9 mph 00:27 17.7 mph 30.6 mph, 2016 12.5 mph, 2014
Mean Wind Direction ENE
Rainfall 0.0 mm 2.4 mm (7%) 5.5 mm, 2013
Maximum Hourly Rain n/a 2.4, 2013
Maximum 10-min Rain n/a 0.6, 2013
Maximum Rain Rate n/a 4.5, 2013
Minimum Dew Point 6.7 °C 17:33 9.3 °C 13.9 °C, 2014 2.8 °C, 2010
Maximum Dew Point 12.6 °C 14:21 14.4 °C 16.1 °C, 2018 8.4 °C, 2010
Mean Dew Point 10.4 °C 12.1 °C 14.8 °C, 2014 5.1 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 12.1 °C 07:24 12.1 °C 17.3 °C, 2018 7.8 °C, 2013
Day Maximum (09-21) 21.1 °C 14:29 21.9 °C 24.8 °C, 2018 13.4 °C, 2013
Max 10m Temp Rise 0.6 °C 11:31 0.6 °C 0.7 °C, 2013 0.3 °C, 2016
Max 1hr Temp Rise 2.4 °C 09:53 2.6 °C 2.8 °C, 2010 0.8 °C, 2016
Max 1hr Hum Rise 15% 19:12 11% 15%, 2020 4%, 2014
Max 10m Temp Fall 0.5 °C 18:57 0.6 °C 0.5 °C, 2010 0.2 °C, 2014
Max 1hr Temp Fall 2.0 °C 19:24 2.1 °C 2.6 °C, 2010 0.8 °C, 2014
Max 1hr Hum Fall 10% 12:59 11% 26%, 2012 2%, 2016
Max 10m Wind Speed 8.4 mph 00:32 7.2 mph 14.0 mph, 2016 6.0 mph, 2019
Minimum Feels-like 13.2 °C 07:09 13.0 °C 20.3 °C, 2018 5.1 °C, 2013
Maximum Feels-like 23.6 °C 14:29 25.1 °C 27.5 °C, 2018 15.4 °C, 2010
Mean Feels-like 17.5 °C 19.3 °C 23.3 °C, 2018 11.3 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 9.0 °C (+1.7) 10.0 °C (+1.9) 9.1 °C (+1.8), 2019 3.9 °C (-3.4), 2014
Humidity Range 42% 35% 52%, 2018 10%, 2016
Pressure Range 4 hPa 4 hPa 20 hPa, 2015 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 11 [97%]107 hrs (133%) [54%] 11.4 [101%], 2019 0 [0%], 2016
Wet Hours 05.5 hrs (24%) [1.3%] 5, 2013 0, 2009
Cloud Cover Sunny
Events Maximum possible sunshine
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 17.0 °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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