Daily Report for 21st December 2018

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.1 °C (+6.1) 00:07 5.4 °C (+2.1) 9.8 °C (+6.8), 2017 -2.9 °C (-5.9), 2009
Maximum Temperature 12.5 °C (+5.0) 08:28 10.0 °C (+1.8) 12.9 °C (+5.4), 2015 1.4 °C (-6.1), 2010
Mean Temperature 11.1 °C (+5.6) 7.9 °C (+2.0) 11.1 °C, 2018 -0.5 °C, 2009
Minimum Humidity 72% 14:47 77% 93%, 2010 72%, 2018
Maximum Humidity 95% 02:06 93% 98%, 2009 83%, 2016
Mean Humidity 85% 86% 96%, 2010 79%, 2016
Minimum Pressure 995 hPa 05:46 1007 hPa 1035 hPa, 2017 972 hPa, 2019
Maximum Pressure 1007 hPa 19:31 1016 hPa 1036 hPa, 2017 986 hPa, 2019
Mean Pressure 1002 hPa 1012 hPa 1035 hPa, 2017 980 hPa, 2019
Mean Wind Speed 9.2 mph (+4.1) 6.0 mph (+0.9) 11.9 mph, 2013 2.0 mph, 2009
Maximum Wind Speed 23.3 mph 12:43 15.0 mph 23.3 mph, 2018 8.1 mph, 2009
Maximum Gust 39.2 mph 12:43 24.2 mph 39.2 mph, 2018 10.2 mph, 2009
Mean Wind Direction SW
Rainfall 9.5 mm 56.2 mm (148%) 9.5 mm, 2018
Maximum Hourly Rain 4.4 mm 01:33 4.4 mm, 2018
Maximum 10-min Rain 1.1 mm 01:31 1.2 mm, 2013
Maximum Rain Rate 13 mm/h 00:22 54 mm/h, 2013
Minimum Dew Point 6.6 °C 16:30 3.2 °C 8.3 °C, 2017 -4.4 °C, 2009
Maximum Dew Point 11.4 °C 07:06 8.0 °C 11.4 °C, 2018 0.8 °C, 2010
Mean Dew Point 8.6 °C 5.7 °C 9.6 °C, 2017 -1.5 °C, 2009
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 8.5 °C * 21:26 6.2 °C 10.1 °C, 2017 -2.9 °C, 2009
Day Maximum (09-21) * 12.3 °C * 09:03 9.8 °C 12.9 °C, 2015 1.4 °C, 2010
Max 10m Temp Rise 0.3 °C 00:57 0.3 °C 1.3 °C, 2009 0.1 °C, 2010
Max 1hr Temp Rise 1.0 °C 01:35 1.1 °C 1.9 °C, 2009 0.4 °C, 2017
Max 1hr Hum Rise 6% 22:35 6% 10%, 2013 2%, 2010
Max 10m Temp Fall 0.3 °C 09:29 0.3 °C 1.3 °C, 2009 0.1 °C, 2010
Max 1hr Temp Fall 1.2 °C 09:53 1.0 °C 1.7 °C, 2013 0.3 °C, 2010
Max 1hr Hum Fall 11% 10:03 6% 12%, 2013 2%, 2010
Max 10m Wind Speed 18.8 mph 11:55 11.3 mph 18.8 mph, 2018 5.4 mph, 2009
Minimum Feels-like 7.0 °C 01:00 2.2 °C 7.3 °C, 2017 -5.7 °C, 2009
Maximum Feels-like 14.4 °C 08:28 10.4 °C 14.8 °C, 2015 1.4 °C, 2010
Mean Feels-like 11.7 °C 6.7 °C 11.7 °C, 2017 -1.2 °C, 2010
Air-frost Hrs 0 hrs 0 hrs 13 hrs, 2009 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.4 °C (-1.1) 4.6 °C (-0.2) 7.0 °C (+2.5), 2014 1.1 °C (-3.4), 2010
Humidity Range 23% 16% 23%, 2018 4%, 2010
Pressure Range 12 hPa 10 hPa 13 hPa, 2019 1 hPa, 2017
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0.3 [4%]42 hrs (129%) [28%] 2.5 [36%], 2012 0 [0%], 2009
Wet Hours 7
[Mean rain rate: 1.4 mm/h]
54 hrs (129%) [11%] 12, 2013 0, 2012
Cloud Cover Mostly Cloudy with periods of Partly Cloudy
Events None
Comments o.night Rain; 09 Shower
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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