Daily Report for 18th July 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 13.3 °C (-0.3) 06:21 14.0 °C (+0.9) 17.5 °C (+3.8), 2014 11.2 °C (-2.5), 2010
Maximum Temperature 21.2 °C (-1.4) 15:01 22.3 °C (+0.1) 31.2 °C (+8.6), 2014 18.4 °C (-4.2), 2011
Mean Temperature 16.1 °C (-0.9) 17.4 °C (+0.5) 24.1 °C, 2014 15.1 °C, 2011
Minimum Humidity 44% 15:10 52% 71%, 2012 22%, 2016
Maximum Humidity 86% 00:06 89% 95%, 2014 70%, 2013
Mean Humidity 69% 73% 85%, 2012 52%, 2013
Minimum Pressure 1008 hPa 03:16 1009 hPa 1025 hPa, 2013 995 hPa, 2011
Maximum Pressure 1011 hPa 16:01 1014 hPa 1027 hPa, 2013 1000 hPa, 2011
Mean Pressure 1010 hPa 1012 hPa 1026 hPa, 2013 998 hPa, 2011
Mean Wind Speed n/a (-4.3) 0.0 mph (-4.3) 7.2, 2011 2.1, 2016
Maximum Wind Speed n/a 0.0 mph 19.3, 2017 6.9, 2018
Maximum Gust n/a 0.0 mph 29.4, 2017 11.5, 2018
Mean Wind Direction n/a
Rainfall trace 36.0 mm (148%) 11.7, 2014
Maximum Hourly Rain n/a 6, 2014
Maximum 10-min Rain n/a 4.5, 2014
Maximum Rain Rate n/a 72, 2014
Minimum Dew Point 7.7 °C 15:27 9.6 °C 12.4 °C, 2020 4.1 °C, 2010
Maximum Dew Point 11.7 °C 00:09 14.9 °C 20.1 °C, 2014 11.0 °C, 2015
Mean Dew Point 10.1 °C 12.2 °C 15.8 °C, 2014 7.9 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 13.3 °C 14.0 °C 17.5 °C, 2014 11.2 °C, 2010
Day Maximum (09-21) 21.2 °C 22.3 °C 31.2 °C, 2014 18.2 °C, 2012
Max 10m Temp Rise 1.2 °C 14:43 0.7 °C 1.2 °C, 2009 0.5 °C, 2011
Max 1hr Temp Rise 2.0 °C 13:04 1.6 °C 2.8 °C, 2016 1.5 °C, 2019
Max 1hr Hum Rise 19% 19:33 8% 19%, 2009 6%, 2019
Max 10m Temp Fall 1.8 °C 19:20 0.6 °C 1.8 °C, 2009 0.4 °C, 2012
Max 1hr Temp Fall 3.1 °C 19:33 1.4 °C 3.5 °C, 2010 1.3 °C, 2019
Max 1hr Hum Fall 14% 13:04 8% 22%, 2014 10%, 2010
Max 10m Wind Speed 4.2 mph 0.9 mph 11.4 mph, 2011 4.2 mph, 2009
Minimum Feels-like n/a 0.0 °C 22.2, 2014 11.2, 2010
Maximum Feels-like n/a 0.0 °C 36.5, 2014 20.6, 2011
Mean Feels-like n/a 0.0 °C 28.7, 2014 17.1, 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 7.9 °C (-1.0) 8.4 °C (-0.9) 14.5 °C (+5.6), 2016 4.0 °C (-4.9), 2012
Humidity Range 42% 37% 65%, 2014 21%, 2012
Pressure Range 3 hPa 5 hPa 12 hPa, 2012 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7.3 [50%]98 hrs (90%) [37%] 14.6 [100%], 2016 0.1 [1%], 2012
Wet Hours 0.526 hrs (133%) [6.1%] 5, 2019 0, 2010
Cloud Cover not available
Events None
Comments ~18-19 SLight Rain
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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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions


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Wind rose