Daily Report for 30th June 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 16.1 °C (+4.1) 05:13 11.5 °C (+0.4) 17.2 °C (+5.2), 2010 8.5 °C (-3.5), 2014
Maximum Temperature 29.4 °C (+7.9) 15:30 21.3 °C (+1.1) 29.4 °C (+7.9), 2009 20.0 °C (-1.5), 2014
Mean Temperature 22.1 °C (+6.0) 16.1 °C (+0.7) 22.4 °C, 2015 14.8 °C, 2014
Minimum Humidity 34% 17:06 48% 55%, 2016 24%, 2015
Maximum Humidity 91% 06:34 87% 95%, 2014 72%, 2010
Mean Humidity 64% 69% 75%, 2016 45%, 2015
Minimum Pressure 1020 hPa 19:09 1015 hPa 1024 hPa, 2011 999 hPa, 2017
Maximum Pressure 1023 hPa 16:17 1019 hPa 1026 hPa, 2011 1010 hPa, 2016
Mean Pressure 1022 hPa 1017 hPa 1025 hPa, 2011 1004 hPa, 2017
Mean Wind Speed n/a (-4.4) 0.0 mph (-4.4) 8.5, 2012 1.8, 2014
Maximum Wind Speed n/a 0.0 mph 20.5, 2016 9, 2014
Maximum Gust n/a 0.0 mph 27.7, 2012 12.1, 2014
Mean Wind Direction n/a
Rainfall 0.0 mm 70.6 mm (128%) 0.7 mm, 2014
Maximum Hourly Rain n/a 0.7, 2014
Maximum 10-min Rain n/a 0.3, 2014
Maximum Rain Rate n/a 0.7, 2014
Minimum Dew Point 9.6 °C 22:10 7.0 °C 10.9 °C, 2010 4.8 °C, 2011
Maximum Dew Point 18.1 °C 10:20 12.7 °C 18.1 °C, 2009 9.5 °C, 2011
Mean Dew Point 14.0 °C 9.8 °C 14.0 °C, 2009 6.8 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 16.1 °C 11.7 °C 17.2 °C, 2010 8.5 °C, 2014
Day Maximum (09-21) 29.4 °C 21.3 °C 29.4 °C, 2009 20.0 °C, 2014
Max 10m Temp Rise 0.8 °C 10:07 0.8 °C 0.8 °C, 2009 0.4 °C, 2016
Max 1hr Temp Rise 3.1 °C 13:14 2.5 °C 3.3 °C, 2015 1.5 °C, 2012
Max 1hr Hum Rise 13% 21:45 9% 17%, 2011 7%, 2010
Max 10m Temp Fall 1.6 °C 21:45 0.6 °C 1.6 °C, 2009 0.3 °C, 2016
Max 1hr Temp Fall 3.2 °C 21:45 1.9 °C 3.2 °C, 2009 1.2 °C, 2016
Max 1hr Hum Fall 13% 10:57 12% 17%, 2014 7%, 2017
Max 10m Wind Speed n/a 0.0 mph 16.4, 2016 5.9, 2011
Minimum Feels-like n/a 0.0 °C 19.3, 2010 8.6, 2011
Maximum Feels-like n/a 0.0 °C 30.5, 2015 20.5, 2011
Mean Feels-like n/a 0.0 °C 23.4, 2010 15.9, 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 13.3 °C (+3.8) 9.8 °C (+0.7) 15.9 °C (+6.4), 2015 6.4 °C (-3.1), 2016
Humidity Range 57% 39% 57%, 2009 29%, 2017
Pressure Range 3 hPa 5 hPa 11 hPa, 2017 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 14.9 [99%]192 hrs (101%) [43%] 15 [99%], 2015 0.5 [3%], 2016
Wet Hours 037 hrs (99%) [5.1%] 3, 2016 0, 2009
Cloud Cover not available
Events Maximum possible sunshine
Comments -
Extra Comments
Issues Tmax corrected as unreliable
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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