Daily Report for 21st August 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 14.2 °C (+1.1) 05:25 13.4 °C (-0.1) 19.0 °C (+5.9), 2010 7.7 °C (-5.4), 2014
Maximum Temperature 18.7 °C (-3.5) 17:57 21.2 °C (-1.2) 25.9 °C (+3.7), 2013 18.4 °C (-3.8), 2014
Mean Temperature 16.3 °C (-1.2) 17.2 °C (-0.6) 21.3 °C, 2015 13.5 °C, 2014
Minimum Humidity 79% 19:07 51% 79%, 2017 34%, 2013
Maximum Humidity 86% 07:21 81% 91%, 2010 84%, 2013
Mean Humidity 83% 67% 85%, 2010 57%, 2013
Minimum Pressure 1021 hPa 04:58 1014 hPa 1021 hPa, 2013 1009 hPa, 2016
Maximum Pressure 1023 hPa 11:34 1019 hPa 1027 hPa, 2013 1017 hPa, 2014
Mean Pressure 1022 hPa 1017 hPa 1024 hPa, 2013 1014 hPa, 2014
Mean Wind Speed 1.9 mph (-2.1) 4.3 mph (+0.3) 11.1 mph, 2016 1.9 mph, 2017
Maximum Wind Speed 7.2 mph 00:33 12.0 mph 21.5 mph, 2016 7.2 mph, 2017
Maximum Gust 10.5 mph 00:16 18.4 mph 35.5 mph, 2016 10.5 mph, 2017
Mean Wind Direction SSE
Rainfall 4.3 mm 76.9 mm (214%) 4.3 mm, 2017
Maximum Hourly Rain 1.3 mm 05:32 1.3 mm, 2017
Maximum 10-min Rain 0.3 mm 05:48 0.3 mm, 2009
Maximum Rain Rate 3.0 mm/h 05:48 3.0 mm/h, 2017
Minimum Dew Point 11.0 °C 00:03 7.8 °C 16.8 °C, 2010 4.2 °C, 2014
Maximum Dew Point 15.1 °C 16:28 13.1 °C 18.3 °C, 2010 9.1 °C, 2014
Mean Dew Point 13.4 °C 10.6 °C 17.6 °C, 2010 6.3 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 14.2 °C 05:25 13.6 °C 19.0 °C, 2010 7.7 °C, 2014
Day Maximum (09-21) 18.7 °C 17:57 21.2 °C 25.9 °C, 2013 18.4 °C, 2014
Max 10m Temp Rise 0.2 °C 14:45 0.6 °C 1.1 °C, 2009 0.2 °C, 2017
Max 1hr Temp Rise 0.8 °C 15:35 2.1 °C 3.8 °C, 2009 0.8 °C, 2017
Max 1hr Hum Rise 3% 01:01 8% 18%, 2016 3%, 2017
Max 10m Temp Fall 0.1 °C 04:43 0.6 °C 1.2 °C, 2009 0.1 °C, 2017
Max 1hr Temp Fall 0.4 °C 21:20 1.8 °C 2.7 °C, 2009 0.4 °C, 2017
Max 1hr Hum Fall 2% 14:30 9% 23%, 2009 2%, 2017
Max 10m Wind Speed 5.9 mph 00:16 9.0 mph 16.6 mph, 2016 5.9 mph, 2017
Minimum Feels-like 16.2 °C 00:01 14.3 °C 24.3 °C, 2010 6.0 °C, 2014
Maximum Feels-like 22.7 °C 17:16 23.3 °C 29.7 °C, 2015 18.4 °C, 2014
Mean Feels-like 19.4 °C 18.9 °C 25.9 °C, 2010 13.6 °C, 2014
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.5 °C (-4.6) 7.8 °C (-1.2) 14.1 °C (+5.0), 2013 3.1 °C (-6.0), 2010
Humidity Range 7% 31% 50%, 2013 7%, 2017
Pressure Range 2 hPa 5 hPa 12 hPa, 2016 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]113 hrs (90%) [40%] 11 [85%], 2013 0 [0%], 2017
Wet Hours 7
[Mean rain rate: 0.6 mm/h]
39 hrs (150%) [7.6%] 7, 2017 0, 2010
Cloud Cover Overcast
Events None
Comments o.night Rain
Extra Comments
Issues Rn data from N16
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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