Daily Report for 18th June 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 11.1 °C (-0.1) 05:07 10.4 °C (-0.3) 18.8 °C (+7.6), 2017 10.9 °C (-0.3), 2010
Maximum Temperature 18.6 °C (-1.9) 12:48 19.7 °C (+0.1) 31.8 °C (+11.3), 2017 16.3 °C (-4.2), 2016
Mean Temperature 15.0 °C (-1.0) 14.8 °C (-0.1) 25.9 °C, 2017 13.9 °C, 2010
Minimum Humidity 46% 17:57 49% 68%, 2016 39%, 2017
Maximum Humidity 91% 06:13 87% 95%, 2011 74%, 2017
Mean Humidity 66% 69% 81%, 2016 54%, 2017
Minimum Pressure 1016 hPa 19:56 1013 hPa 1024 hPa, 2014 996 hPa, 2011
Maximum Pressure 1019 hPa 08:03 1018 hPa 1027 hPa, 2014 1005 hPa, 2011
Mean Pressure 1018 hPa 1015 hPa 1026 hPa, 2014 1000 hPa, 2011
Mean Wind Speed n/a (-4.4) 0.0 mph (-4.4) 7.6, 2011 1.1, 2017
Maximum Wind Speed n/a 0.0 mph 16.6, 2011 5.7, 2017
Maximum Gust n/a 0.0 mph 25.9, 2011 8.4, 2017
Mean Wind Direction n/a
Rainfall 0.0 mm 34.6 mm (105%) 2.3 mm, 2012
Maximum Hourly Rain n/a 1.1, 2012
Maximum 10-min Rain n/a 0.5, 2012
Maximum Rain Rate n/a 30, 2012
Minimum Dew Point 5.2 °C 19:21 5.9 °C 13.8 °C, 2017 4.7 °C, 2015
Maximum Dew Point 11.3 °C 00:02 11.6 °C 17.3 °C, 2017 11.2 °C, 2012
Mean Dew Point 8.2 °C 8.7 °C 15.6 °C, 2017 8.2 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 11.1 °C 10.6 °C 18.8 °C, 2017 10.9 °C, 2010
Day Maximum (09-21) 18.6 °C 19.7 °C 31.8 °C, 2017 16.3 °C, 2016
Max 10m Temp Rise 0.6 °C 12:45 0.8 °C 0.8 °C, 2013 0.4 °C, 2016
Max 1hr Temp Rise 2.2 °C 10:17 2.5 °C 2.5 °C, 2017 1.0 °C, 2016
Max 1hr Hum Rise 7% 23:20 9% 17%, 2011 4%, 2013
Max 10m Temp Fall 0.3 °C 18:21 0.6 °C 0.7 °C, 2015 0.3 °C, 2009
Max 1hr Temp Fall 1.0 °C 19:04 1.7 °C 1.9 °C, 2014 1.0 °C, 2009
Max 1hr Hum Fall 16% 10:17 11% 16%, 2009 5%, 2016
Max 10m Wind Speed n/a 0.0 mph 12.8, 2011 3.7, 2017
Minimum Feels-like n/a 0.0 °C 22.1, 2017 10.9, 2010
Maximum Feels-like n/a 0.0 °C 36.7, 2017 18.2, 2016
Mean Feels-like n/a 0.0 °C 30.3, 2017 15.1, 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 7.5 °C (-1.8) 9.3 °C (+0.5) 13.0 °C (+3.7), 2017 4.1 °C (-5.2), 2016
Humidity Range 45% 38% 46%, 2014 17%, 2010
Pressure Range 3 hPa 5 hPa 11 hPa, 2016 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 4.5 [30%]99 hrs (87%) [37%] 11 [73%], 2017 0.1 [1%], 2016
Wet Hours 032 hrs (145%) [7.5%] 3, 2012 0, 2009
Cloud Cover not available
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? No
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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