Daily Report for 20th September 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.1 °C (-1.8) 03:27 10.2 °C (-1.3) 14.9 °C (+4.0), 2014 8.4 °C (-2.5), 2015
Maximum Temperature 17.6 °C (-0.4) 13:32 18.1 °C (-1.4) 20.5 °C (+2.5), 2010 17.3 °C (-0.7), 2012
Mean Temperature 13.8 °C (-1.1) 14.0 °C (-1.3) 17.1 °C, 2010 13.2 °C, 2012
Minimum Humidity 70% 13:38 59% 92%, 2014 47%, 2010
Maximum Humidity 96% 05:48 92% 96%, 2014 78%, 2012
Mean Humidity 83% 79% 94%, 2014 62%, 2012
Minimum Pressure 1016 hPa 23:30 1007 hPa 1021 hPa, 2015 1011 hPa, 2013
Maximum Pressure 1022 hPa 00:00 1014 hPa 1027 hPa, 2015 1017 hPa, 2010
Mean Pressure 1019 hPa 1011 hPa 1025 hPa, 2015 1014 hPa, 2010
Mean Wind Speed 4.7 mph (+0.8) 4.6 mph (+0.7) 7.4 mph, 2011 1.8 mph, 2016
Maximum Wind Speed 12.1 mph 17:40 13.0 mph 14.5 mph, 2011 7.4 mph, 2013
Maximum Gust 18.4 mph 17:02 20.4 mph 22.6 mph, 2010 9.2 mph, 2013
Mean Wind Direction SW
Rainfall 0.0 mm 30.5 mm (80%) 29.3 mm, 2014
Maximum Hourly Rain n/a 18.7, 2014
Maximum 10-min Rain n/a 7.9, 2014
Maximum Rain Rate n/a 126, 2014
Minimum Dew Point 8.0 °C 03:17 7.8 °C 13.8 °C, 2014 3.0 °C, 2012
Maximum Dew Point 12.9 °C 10:59 12.6 °C 17.1 °C, 2014 8.3 °C, 2012
Mean Dew Point 10.9 °C 10.1 °C 15.6 °C, 2014 5.9 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 8.2 °C * 22:06 10.3 °C 16.1 °C, 2014 8.2 °C, 2017
Day Maximum (09-21) 17.6 °C 13:32 18.1 °C 20.5 °C, 2010 17.3 °C, 2012
Max 10m Temp Rise 0.6 °C 08:50 0.6 °C 0.7 °C, 2013 0.3 °C, 2011
Max 1hr Temp Rise 2.9 °C 09:11 2.1 °C 2.9 °C, 2015 0.8 °C, 2014
Max 1hr Hum Rise 6% 14:47 11% 9%, 2010 1%, 2014
Max 10m Temp Fall 0.4 °C 18:39 0.7 °C 0.6 °C, 2013 0.2 °C, 2014
Max 1hr Temp Fall 1.3 °C 19:29 1.9 °C 2.5 °C, 2013 0.8 °C, 2016
Max 1hr Hum Fall 9% 09:11 10% 13%, 2013 2%, 2014
Max 10m Wind Speed 9.4 mph 17:42 9.6 mph 10.0 mph, 2011 5.5 mph, 2009
Minimum Feels-like 7.3 °C 03:44 10.0 °C 18.1 °C, 2014 7.3 °C, 2012
Maximum Feels-like 20.1 °C 13:23 20.1 °C 23.5 °C, 2014 17.3 °C, 2012
Mean Feels-like 15.4 °C 15.3 °C 20.9 °C, 2014 13.0 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.5 °C (+1.4) 8.0 °C (-0.0) 10.8 °C (+3.7), 2015 3.3 °C (-3.8), 2014
Humidity Range 26% 33% 40%, 2010 4%, 2014
Pressure Range 6 hPa 7 hPa 11 hPa, 2013 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2 [18%]82 hrs (87%) [35%] 8 [72%], 2015 0 [0%], 2016
Wet Hours 035 hrs (128%) [7.3%] 2, 2011 0, 2009
Cloud Cover Mostly Cloudy with periods of Partly Cloudy
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Notes
Times of extremes are computed using the midpoint time of the extremum (if the value persisted for >1 minute).
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; 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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