Daily Report for 12th January 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 0.9 °C (-1.5) 18:15 2.7 °C (+0.3) 7.9 °C (+5.5), 2015 -0.9 °C (-3.3), 2014
Maximum Temperature 6.8 °C (-0.2) 11:21 8.2 °C (+1.1) 12.5 °C (+5.5), 2012 1.5 °C (-5.5), 2010
Mean Temperature 4.6 °C (-0.9) 5.6 °C (+0.7) 10.2 °C, 2015 0.7 °C, 2010
Minimum Humidity 62% 00:12 70% 87%, 2010 55%, 2013
Maximum Humidity 87% 18:42 84% 98%, 2010 87%, 2017
Mean Humidity 75% 78% 94%, 2014 75%, 2017
Minimum Pressure 992 hPa 18:01 1018 hPa 1025 hPa, 2012 989 hPa, 2016
Maximum Pressure 1014 hPa 01:06 1026 hPa 1032 hPa, 2012 1008 hPa, 2016
Mean Pressure 1003 hPa 1022 hPa 1028 hPa, 2012 997 hPa, 2016
Mean Wind Speed 5.4 mph (+0.2) 4.2 mph (-1.0) 10.0 mph, 2015 3.8 mph, 2014
Maximum Wind Speed 17.0 mph 21:44 11.7 mph 22.5 mph, 2015 12.1 mph, 2014
Maximum Gust 24.1 mph 21:44 17.4 mph 30.6 mph, 2015 16.1 mph, 2010
Mean Wind Direction W
Rainfall / Snow-melt approx. 15.9 mm 34.3 mm (161%) 15.9 mm, 2017
Maximum Hourly Rain 4.6 mm 16:46 4.6 mm, 2017
Maximum 10-min Rain 1.0 mm 16:04 1.0 mm, 2017
Maximum Rain Rate 18 mm/h 16:52 18 mm/h, 2017
Minimum Dew Point -2.5 °C 23:55 -0.9 °C 3.2 °C, 2015 -4.1 °C, 2013
Maximum Dew Point 3.1 °C 12:56 4.7 °C 11.4 °C, 2011 0.7 °C, 2010
Mean Dew Point 0.4 °C 2.0 °C 8.1 °C, 2011 -0.3 °C, 2010
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * 5.5 °C * 04:00 4.1 °C 7.7 °C, 2009 -0.9 °C, 2014
Day Maximum (09-21) 6.8 °C 11:21 8.2 °C 12.5 °C, 2012 1.5 °C, 2010
Max 10m Temp Rise 0.2 °C 09:55 0.3 °C 0.6 °C, 2014 0.1 °C, 2010
Max 1hr Temp Rise 0.7 °C 10:45 1.1 °C 2.7 °C, 2014 0.4 °C, 2010
Max 1hr Hum Rise 7% 18:20 4% 11%, 2015 2%, 2010
Max 10m Temp Fall 0.8 °C 17:03 0.5 °C 0.8 °C, 2017 0.1 °C, 2010
Max 1hr Temp Fall 3.1 °C 17:31 1.5 °C 3.1 °C, 2017 0.3 °C, 2010
Max 1hr Hum Fall 4% 21:18 6% 16%, 2013 2%, 2011
Max 10m Wind Speed 12.7 mph 21:53 8.9 mph 14.7 mph, 2015 7.7 mph, 2011
Minimum Feels-like -4.9 °C 20:43 -0.9 °C 3.4 °C, 2015 -4.9 °C, 2017
Maximum Feels-like 6.6 °C 12:52 7.8 °C 14.0 °C, 2011 1.4 °C, 2010
Mean Feels-like 1.7 °C 3.7 °C 9.4 °C, 2015 -1.8 °C, 2010
Air-frost Hrs 0 hrs 2 hrs 9 hrs, 2014 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.9 °C (+1.3) 5.4 °C (+0.9) 10.2 °C (+5.6), 2014 1.1 °C (-3.5), 2010
Humidity Range 25% 14% 43%, 2013 11%, 2010
Pressure Range 22 hPa 8 hPa 22 hPa, 2017 5 hPa, 2013
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]20 hrs (115%) [23%] 3 [41%], 2014 0 [0%], 2009
Wet Hours 10
[Mean rain rate: 1.6 mm/h]
41 hrs (156%) [14%] 10, 2011 , 2009
Cloud Cover Overcast
Events Snowfall: ~4 cm
Comments 11-20 Rain -> Snow (17- Snow); some settling of snow on favoured surfaces
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
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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