Daily Report for 18th August 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 15.6 °C (+2.4) 03:12 14.6 °C (+1.1) 20.0 °C (+6.8), 2012 11.4 °C (-1.8), 2014
Maximum Temperature 21.8 °C (-0.5) 17:36 24.9 °C (+2.4) 30.0 °C (+7.7), 2012 17.1 °C (-5.2), 2011
Mean Temperature 18.6 °C (+0.9) 19.8 °C (+1.7) 25.0 °C, 2012 13.7 °C, 2011
Minimum Humidity 64% 17:33 48% 64%, 2018 40%, 2012
Maximum Humidity 84% 08:27 89% 93%, 2011 71%, 2015
Mean Humidity 75% 70% 82%, 2011 53%, 2012
Minimum Pressure 1020 hPa 04:56 1015 hPa 1020 hPa, 2018 1007 hPa, 2010
Maximum Pressure 1022 hPa 10:19 1020 hPa 1022 hPa, 2018 1010 hPa, 2010
Mean Pressure 1021 hPa 1018 hPa 1021 hPa, 2018 1008 hPa, 2010
Mean Wind Speed 5.8 mph (+1.8) 4.1 mph (+0.1) 6.3 mph, 2017 3.1 mph, 2016
Maximum Wind Speed 12.2 mph 12:13 12.2 mph 14.3 mph, 2010 9.2 mph, 2009
Maximum Gust 19.6 mph 13:05 19.5 mph 22.4 mph, 2010 13.6 mph, 2009
Mean Wind Direction WSW
Rainfall 0.0 mm 36.4 mm (118%) 14.6 mm, 2011
Maximum Hourly Rain n/a 9.9, 2017
Maximum 10-min Rain n/a 5.9, 2017
Maximum Rain Rate n/a 66, 2017
Minimum Dew Point 12.0 °C 00:02 11.2 °C 12.0 °C, 2018 5.6 °C, 2014
Maximum Dew Point 15.7 °C 21:34 16.1 °C 16.5 °C, 2012 10.5 °C, 2014
Mean Dew Point 14.0 °C 13.7 °C 14.5 °C, 2012 8.6 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 15.6 °C 03:13 15.0 °C 20.0 °C, 2012 11.4 °C, 2014
Day Maximum (09-21) 21.8 °C 17:37 24.7 °C 30.0 °C, 2012 17.1 °C, 2011
Max 10m Temp Rise 0.4 °C 12:50 0.6 °C 0.8 °C, 2017 0.3 °C, 2011
Max 1hr Temp Rise 1.0 °C 10:43 2.5 °C 2.8 °C, 2010 1.0 °C, 2018
Max 1hr Hum Rise 5% 22:10 12% 20%, 2017 5%, 2018
Max 10m Temp Fall 0.2 °C 01:42 0.6 °C 2.9 °C, 2017 0.2 °C, 2015
Max 1hr Temp Fall 0.8 °C 02:20 2.2 °C 4.4 °C, 2017 0.6 °C, 2015
Max 1hr Hum Fall 7% 11:26 14% 15%, 2016 6%, 2015
Max 10m Wind Speed 8.8 mph 14:21 9.0 mph 11.5 mph, 2010 6.1 mph, 2009
Minimum Feels-like 17.9 °C 03:02 17.0 °C 22.9 °C, 2012 11.5 °C, 2014
Maximum Feels-like 25.9 °C 17:53 28.3 °C 34.9 °C, 2012 18.7 °C, 2011
Mean Feels-like 22.0 °C 23.1 °C 28.7 °C, 2012 15.3 °C, 2011
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.2 °C (-2.8) 10.3 °C (+1.3) 10.0 °C (+1.0), 2012 4.9 °C (-4.1), 2015
Humidity Range 20% 41% 50%, 2010 20%, 2018
Pressure Range 2 hPa 6 hPa 5 hPa, 2012 2 hPa, 2015
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [8%]129 hrs (119%) [53%] 12 [91%], 2012 0 [0%], 2011
Wet Hours 023 hrs (104%) [5.3%] 2.5, 2011 0, 2009
Cloud Cover Overcast with periods of Mostly Cloudy
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °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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