Daily Report for 21st September 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.9 °C (+1.1) 23:56 10.3 °C (-1.2) 14.0 °C (+3.2), 2016 9.5 °C (-1.3), 2010
Maximum Temperature 17.8 °C (-0.1) 14:52 18.1 °C (-1.3) 21.4 °C (+3.5), 2016 15.2 °C (-2.7), 2015
Mean Temperature 15.4 °C (+0.5) 14.1 °C (-1.2) 17.5 °C, 2016 13.1 °C, 2012
Minimum Humidity 69% 12:26 60% 79%, 2013 44%, 2009
Maximum Humidity 92% 21:21 92% 95%, 2010 85%, 2016
Mean Humidity 82% 79% 87%, 2015 70%, 2009
Minimum Pressure 1014 hPa 13:46 1007 hPa 1024 hPa, 2009 1006 hPa, 2015
Maximum Pressure 1019 hPa 23:45 1014 hPa 1027 hPa, 2009 1018 hPa, 2011
Mean Pressure 1015 hPa 1011 hPa 1026 hPa, 2009 1012 hPa, 2015
Mean Wind Speed 5.6 mph (+1.7) 4.6 mph (+0.7) 5.6 mph, 2017 2.2 mph, 2010
Maximum Wind Speed 15.3 mph 10:33 13.1 mph 15.3 mph, 2017 8.5 mph, 2012
Maximum Gust 21.9 mph 16:43 20.5 mph 22.5 mph, 2011 12.3 mph, 2010
Mean Wind Direction SW
Rainfall 0.8 mm 31.3 mm (78%) 4.8 mm, 2015
Maximum Hourly Rain 0.8 mm 18:32 2.1 mm, 2015
Maximum 10-min Rain 0.4 mm 18:00 0.6 mm, 2012
Maximum Rain Rate 2.4 mm/h 18:00 8 mm/h, 2012
Minimum Dew Point 10.6 °C 23:56 8.0 °C 10.8 °C, 2016 6.3 °C, 2012
Maximum Dew Point 14.0 °C 18:55 12.7 °C 15.9 °C, 2013 9.5 °C, 2012
Mean Dew Point 12.2 °C 10.2 °C 12.2 °C, 2017 7.6 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 14.2 °C * 21:44 10.5 °C 14.2 °C, 2017 9.5 °C, 2010
Day Maximum (09-21) 17.8 °C 14:52 18.1 °C 21.4 °C, 2016 15.2 °C, 2015
Max 10m Temp Rise 0.5 °C 09:40 0.6 °C 0.8 °C, 2010 0.2 °C, 2015
Max 1hr Temp Rise 1.9 °C 10:19 2.1 °C 3.5 °C, 2010 0.5 °C, 2015
Max 1hr Hum Rise 13% 17:03 11% 19%, 2012 4%, 2013
Max 10m Temp Fall 0.5 °C 16:46 0.7 °C 0.7 °C, 2012 0.2 °C, 2015
Max 1hr Temp Fall 1.4 °C 17:03 1.8 °C 2.5 °C, 2012 1.0 °C, 2015
Max 1hr Hum Fall 11% 10:02 10% 16%, 2016 4%, 2013
Max 10m Wind Speed 10.8 mph 10:13 9.6 mph 10.8 mph, 2017 6.0 mph, 2012
Minimum Feels-like 13.5 °C 23:54 10.2 °C 15.7 °C, 2016 8.7 °C, 2013
Maximum Feels-like 20.4 °C 15:13 20.1 °C 24.1 °C, 2010 16.5 °C, 2012
Mean Feels-like 17.8 °C 15.4 °C 19.9 °C, 2016 13.4 °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 5.9 °C (-1.2) 7.9 °C (-0.1) 11.8 °C (+4.7), 2010 3.9 °C (-3.2), 2015
Humidity Range 23% 32% 47%, 2009 15%, 2013
Pressure Range 5 hPa 7 hPa 15 hPa, 2015 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [9%]83 hrs (84%) [34%] 7 [63%], 2010 0 [0%], 2015
Wet Hours 2
[Mean rain rate: 0.4 mm/h]
37 hrs (129%) [7.3%] 4, 2015 0, 2009
Cloud Cover am: Mostly Cloudy
pm: Overcast
Events None
Comments eve Rain
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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