Daily Report for 17th May 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 8.3 °C (+0.1) 02:58 8.2 °C (+0.9) 12.2 °C (+3.9), 2017 5.7 °C (-2.5), 2010
Maximum Temperature 14.8 °C (-1.9) 14:02 17.0 °C (+1.2) 23.3 °C (+6.6), 2014 11.6 °C (-5.1), 2013
Mean Temperature 11.2 °C (-0.9) 12.3 °C (+1.0) 17.4 °C, 2014 9.7 °C, 2013
Minimum Humidity 58% 13:39 48% 78%, 2017 37%, 2015
Maximum Humidity 88% 11:17 85% 93%, 2010 76%, 2015
Mean Humidity 77% 69% 86%, 2017 54%, 2015
Minimum Pressure 1005 hPa 09:59 1014 hPa 1027 hPa, 2018 1001 hPa, 2013
Maximum Pressure 1010 hPa 12:03 1019 hPa 1029 hPa, 2018 1010 hPa, 2009
Mean Pressure 1008 hPa 1017 hPa 1028 hPa, 2018 1006 hPa, 2013
Mean Wind Speed n/a (-4.7) 0.0 mph (-4.7) 6, 2011 1.2, 2014
Maximum Wind Speed n/a 0.0 mph 12.5, 2011 6.4, 2014
Maximum Gust n/a 0.0 mph 19.6, 2018 8.7, 2014
Mean Wind Direction n/a
Rainfall 3.6 mm 11.8 mm (42%) 35.6 mm, 2017
Maximum Hourly Rain 3.3 mm 10:43 6.9 mm, 2017
Maximum 10-min Rain 1.9 mm 10:06 2.0 mm, 2017
Maximum Rain Rate 33 mm/h 10:03 33 mm/h, 2009
Minimum Dew Point 4.3 °C 02:27 3.3 °C 10.1 °C, 2017 0.6 °C, 2012
Maximum Dew Point 9.4 °C 11:17 9.1 °C 16.2 °C, 2017 5.5 °C, 2012
Mean Dew Point 7.2 °C 6.3 °C 13.6 °C, 2017 3.2 °C, 2012
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 8.3 °C 8.5 °C 16.0 °C, 2017 5.7 °C, 2010
Day Maximum (09-21) 14.8 °C 17.0 °C 23.3 °C, 2014 11.6 °C, 2013
Max 10m Temp Rise 0.7 °C 12:16 0.7 °C 0.7 °C, 2009 0.4 °C, 2019
Max 1hr Temp Rise 3.1 °C 13:03 2.3 °C 3.5 °C, 2020 1.2 °C, 2019
Max 1hr Hum Rise 10% 16:08 9% 11%, 2020 4%, 2017
Max 10m Temp Fall 0.5 °C 10:26 0.5 °C 0.6 °C, 2015 0.3 °C, 2019
Max 1hr Temp Fall 1.2 °C 10:58 1.5 °C 2.5 °C, 2014 0.9 °C, 2019
Max 1hr Hum Fall 24% 13:10 14% 24%, 2009 4%, 2017
Max 10m Wind Speed n/a 0.0 mph 10.1, 2015 4.9, 2014
Minimum Feels-like n/a 0.0 °C 13.5, 2017 2.5, 2018
Maximum Feels-like n/a 0.0 °C 24.9, 2014 11.6, 2013
Mean Feels-like n/a 0.0 °C 19, 2017 9.4, 2013
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 6.5 °C (-1.9) 8.9 °C (+0.4) 14.1 °C (+5.7), 2020 5.5 °C (-2.9), 2013
Humidity Range 30% 37% 53%, 2020 11%, 2017
Pressure Range 5 hPa 5 hPa 14 hPa, 2012 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 2.9 [20%]88 hrs (87%) [37%] 13 [91%], 2018 0 [0%], 2017
Wet Hours 2
[Mean rain rate: 1.8 mm/h]
12 hrs (55%) [2.9%] 14, 2017 0, 2010
Cloud Cover not available
Events None
Comments VHeavy 10, Light/Moderate -11 Rain, SLight 15-17 Showers
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