Daily Report for 4th August 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 16.3 °C (+2.6) 02:58 13.7 °C (-0.1) 18.9 °C (+5.2), 2018 13.1 °C (-0.6), 2010
Maximum Temperature 20.9 °C (-1.8) 18:10 21.1 °C (-1.6) 28.5 °C (+5.9), 2018 19.8 °C (-2.8), 2010
Mean Temperature 18.5 °C (+0.4) 17.3 °C (-0.8) 23.5 °C, 2018 16.4 °C, 2010
Minimum Humidity 69% 00:05 54% 69%, 2009 36%, 2014
Maximum Humidity 90% 08:05 92% 93%, 2011 75%, 2014
Mean Humidity 83% 74% 83%, 2009 54%, 2014
Minimum Pressure 1016 hPa 05:28 1011 hPa 1022 hPa, 2018 1004 hPa, 2010
Maximum Pressure 1018 hPa 21:44 1016 hPa 1026 hPa, 2018 1011 hPa, 2010
Mean Pressure 1017 hPa 1013 hPa 1024 hPa, 2018 1008 hPa, 2010
Mean Wind Speed 4.5 mph (+0.5) 3.3 mph (-0.7) 9.7 mph, 2016 3.3 mph, 2018
Maximum Wind Speed 10.5 mph 8.1 mph 23.2 mph, 2016 9.4 mph, 2018
Maximum Gust 17.2 mph 18:39 12.2 mph 33.9 mph, 2016 13.8 mph, 2018
Mean Wind Direction S
Rainfall trace 0.4 mm (6%) 11.6, 2011
Maximum Hourly Rain n/a 4.4, 2010
Maximum 10-min Rain n/a 2.2, 2010
Maximum Rain Rate n/a 50, 2010
Minimum Dew Point 11.1 °C 00:05 8.8 °C 12.0 °C, 2018 6.8 °C, 2014
Maximum Dew Point 17.3 °C 18:01 15.1 °C 18.1 °C, 2011 12.0 °C, 2017
Mean Dew Point 15.4 °C 12.4 °C 15.6 °C, 2018 9.1 °C, 2014
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 16.3 °C 13.8 °C 18.9 °C, 2018 14.0 °C, 2015
Day Maximum (09-21) 20.9 °C 21.1 °C 28.5 °C, 2018 19.8 °C, 2010
Max 10m Temp Rise 0.3 °C 16:56 0.5 °C 0.7 °C, 2012 0.3 °C, 2009
Max 1hr Temp Rise 0.7 °C 17:31 1.6 °C 2.2 °C, 2015 0.7 °C, 2009
Max 1hr Hum Rise 5% 02:17 8% 27%, 2018 5%, 2009
Max 10m Temp Fall 0.2 °C 20:56 0.4 °C 1.0 °C, 2010 0.2 °C, 2009
Max 1hr Temp Fall 0.6 °C 21:07 1.4 °C 3.9 °C, 2018 0.6 °C, 2009
Max 1hr Hum Fall 3% 16:17 8% 15%, 2014 3%, 2009
Max 10m Wind Speed 6.3 mph 18:15 5.9 mph 16.8 mph, 2016 6.3 mph, 2009
Minimum Feels-like 18.6 °C 00:00 11.1 °C 23.6 °C, 2018 14.1 °C, 2010
Maximum Feels-like 26.4 °C 17:58 18.3 °C 32.0 °C, 2018 21.6 °C, 2015
Mean Feels-like 22.8 °C 14.8 °C 27.9 °C, 2018 18.8 °C, 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 4.6 °C (-4.3) 7.4 °C (-1.5) 9.6 °C (+0.7), 2018 3.6 °C (-5.3), 2011
Humidity Range 21% 37% 47%, 2018 20%, 2010
Pressure Range 2 hPa 5 hPa 7 hPa, 2010 2 hPa, 2009
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.1 [1%]14 hrs (58%) [26%] 13 [93%], 2018 0.1 [1%], 2009
Wet Hours 0.31.3 hrs (27%) [1.4%] 6, 2011 0, 2013
Cloud Cover not available
Events None
Comments Light 2, 12 Showers
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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Daily Graph of Conditions

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