Daily Report for 17th April 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.7 °C (+2.8) 06:37 7.4 °C (+2.6) 10.4 °C (+5.5), 2018 1.4 °C (-3.5), 2016
Maximum Temperature 10.8 °C (-1.9) 16:46 15.2 °C (+3.0) 19.3 °C (+6.6), 2018 10.8 °C (-1.9), 2009
Mean Temperature 9.0 °C (+0.4) 10.7 °C (+2.8) 14.7 °C, 2018 6.7 °C, 2016
Minimum Humidity 94% 00:32 62% 94%, 2009 34%, 2010
Maximum Humidity 97% 12:40 93% 97%, 2009 66%, 2014
Mean Humidity 96% 79% 96%, 2009 54%, 2014
Minimum Pressure 1008 hPa 02:48 1009 hPa 1024 hPa, 2011 993 hPa, 2012
Maximum Pressure 1014 hPa 22:35 1015 hPa 1028 hPa, 2010 1014 hPa, 2009
Mean Pressure 1011 hPa 1012 hPa 1025 hPa, 2011 1006 hPa, 2012
Mean Wind Speed n/a (-4.9) 0.0 mph (-4.9) 9, 2018 2, 2010
Maximum Wind Speed n/a 0.0 mph 22.3, 2012 6.8, 2010
Maximum Gust n/a 0.0 mph 33.5, 2012 9.5, 2010
Mean Wind Direction n/a
Rainfall 7.7 mm 27.4 mm (99%) 7.7 mm, 2009
Maximum Hourly Rain 2.7 mm 18:08 2.7 mm, 2009
Maximum 10-min Rain 1.4 mm 17:32 1.4 mm, 2009
Maximum Rain Rate 33 mm/h 17:24 33 mm/h, 2009
Minimum Dew Point 7.0 °C 23:57 4.2 °C 7.0 °C, 2009 -3.9 °C, 2016
Maximum Dew Point 10.2 °C 18:01 9.6 °C 11.2 °C, 2013 2.8 °C, 2016
Mean Dew Point 8.4 °C 7.0 °C 8.4 °C, 2009 -1.0 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 7.7 °C 7.6 °C 10.4 °C, 2018 1.4 °C, 2016
Day Maximum (09-21) 10.8 °C 15.1 °C 19.3 °C, 2018 10.8 °C, 2009
Max 10m Temp Rise 0.3 °C 09:24 0.3 °C 1.1 °C, 2012 0.3 °C, 2009
Max 1hr Temp Rise 1.0 °C 15:51 0.9 °C 4.9 °C, 2010 1.0 °C, 2009
Max 1hr Hum Rise 1% 01:05 2% 25%, 2012 1%, 2009
Max 10m Temp Fall 0.3 °C 01:00 0.2 °C 1.7 °C, 2012 0.3 °C, 2009
Max 1hr Temp Fall 0.8 °C 20:17 0.6 °C 4.5 °C, 2012 0.8 °C, 2009
Max 1hr Hum Fall 1% 10:42 3% 31%, 2012 1%, 2009
Max 10m Wind Speed n/a 0.0 mph 16.5, 2018 5.3, 2016
Minimum Feels-like n/a 0.0 °C 10.4, 2018 -2, 2016
Maximum Feels-like n/a 0.0 °C 20.2, 2018 11.8, 2016
Mean Feels-like n/a 0.0 °C 15.3, 2018 5.9, 2016
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.1 °C (-4.7) 7.8 °C (+0.4) 15.1 °C (+7.3), 2010 3.1 °C (-4.7), 2009
Humidity Range 3% 30% 60%, 2010 3%, 2009
Pressure Range 6 hPa 6 hPa 25 hPa, 2012 2 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]73 hrs (97%) [35%] 12.5 [99%], 2010 0 [0%], 2009
Wet Hours 8
[Mean rain rate: 1.0 mm/h]
33 hrs (127%) [8.1%] 8, 2009 0, 2010
Cloud Cover not available
Events None
Comments 04-07 Light/Moderate, 15-19 Light (1730-18 Heavy) Rain
Extra Comments
Issues None known
Observer Absent? No
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

daygraph daygraph 2 daygraph-wdir

Webcam Summary of Cloud Conditions


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Wind rose