Daily Report for 12th September 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.1 °C (-2.4) 23:37 11.8 °C (-0.0) 14.6 °C (+3.1), 2011 8.5 °C (-3.0), 2012
Maximum Temperature 16.3 °C (-3.1) 00:01 21.1 °C (+0.9) 24.4 °C (+5.0), 2016 16.3 °C (-3.1), 2018
Mean Temperature 13.1 °C (-2.8) 16.3 °C (+0.4) 17.9 °C, 2011 13.1 °C, 2018
Minimum Humidity 72% 16:08 54% 72%, 2013 48%, 2011
Maximum Humidity 95% 08:00 91% 97%, 2013 83%, 2012
Mean Humidity 87% 74% 87%, 2018 65%, 2015
Minimum Pressure 1020 hPa 01:42 1019 hPa 1028 hPa, 2009 995 hPa, 2017
Maximum Pressure 1025 hPa 13:06 1023 hPa 1034 hPa, 2009 1007 hPa, 2017
Mean Pressure 1023 hPa 1021 hPa 1031 hPa, 2009 1004 hPa, 2017
Mean Wind Speed 1.6 mph (-2.3) 3.9 mph (-0.0) 10.8 mph, 2011 1.6 mph, 2018
Maximum Wind Speed 11.5 mph 02:47 11.8 mph 22.1 mph, 2011 6.7 mph, 2013
Maximum Gust 19.6 mph 02:48 18.6 mph 37.4 mph, 2011 8.7 mph, 2013
Mean Wind Direction N
Rainfall 2.8 mm 4.0 mm (18%) 2.8 mm, 2018
Maximum Hourly Rain 0.8 mm 06:24 2.3 mm, 2012
Maximum 10-min Rain 0.2 mm 04:17 2.3 mm, 2012
Maximum Rain Rate 1.1 mm/h 06:24 60 mm/h, 2012
Minimum Dew Point 7.7 °C 23:04 9.2 °C 11.7 °C, 2013 2.6 °C, 2012
Maximum Dew Point 15.1 °C 00:04 13.7 °C 17.2 °C, 2011 11.3 °C, 2012
Mean Dew Point 10.8 °C 11.3 °C 13.2 °C, 2016 6.7 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 11.4 °C * 07:41 12.0 °C 15.5 °C, 2015 8.5 °C, 2012
Day Maximum (09-21) * 14.6 °C * 16:20 20.9 °C 24.4 °C, 2016 14.6 °C, 2018
Max 10m Temp Rise 0.3 °C 09:50 0.6 °C 0.8 °C, 2012 0.3 °C, 2018
Max 1hr Temp Rise 1.1 °C 09:50 2.4 °C 3.4 °C, 2012 1.1 °C, 2018
Max 1hr Hum Rise 6% 20:27 9% 14%, 2017 5%, 2011
Max 10m Temp Fall 0.8 °C 02:56 0.5 °C 1.0 °C, 2012 0.4 °C, 2010
Max 1hr Temp Fall 2.3 °C 03:27 1.7 °C 2.6 °C, 2012 1.0 °C, 2013
Max 1hr Hum Fall 7% 12:04 12% 16%, 2014 6%, 2013
Max 10m Wind Speed 5.6 mph 02:55 8.4 mph 14.8 mph, 2011 5.3 mph, 2013
Minimum Feels-like 8.5 °C 23:30 12.6 °C 15.0 °C, 2011 6.1 °C, 2012
Maximum Feels-like 20.3 °C 00:00 23.6 °C 28.9 °C, 2016 18.3 °C, 2012
Mean Feels-like 14.8 °C 18.3 °C 20.6 °C, 2016 13.3 °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 7.2 °C (-0.8) 9.3 °C (+0.9) 14.4 °C (+6.4), 2016 5.7 °C (-2.3), 2013
Humidity Range 23% 37% 44%, 2011 23%, 2018
Pressure Range 5 hPa 4 hPa 12 hPa, 2017 2 hPa, 2016
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]69 hrs (119%) [48%] 10 [86%], 2009 0.1 [1%], 2018
Wet Hours 6
[Mean rain rate: 0.5 mm/h]
8 hrs (49%) [2.8%] 6, 2018 0, 2009
Cloud Cover Overcast
Events None
Comments o.night 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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