2014_SEP_19: dew points ... southern England

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2014_SEP_19: dew points ... southern England

Postby Martin Rowley » 2014 Sep 19, 18:13

... dew points 18/19degC must be fairly unusual for second-half of September; Anyone any data on this?

Martin.
Martin Rowley
West Moors, East Dorset [ altitude: 17 m/56' ]
NGR SU 082 023: postcode BH22 0GB
50deg49min15secN, 01deg53min03secW
Martin Rowley
 
Posts: 154
Joined: 2011 Nov 25, 12:54

Re: 2014_SEP_19: dew points ... southern England

Postby Nick Gardner » 2014 Sep 20, 19:02

Martin

DPs here for the last few days have at times been between 19°C & 20°C.
Date Temp Max DP
15th 22.2°C 15.6°C
16th 24.6°C 18.5°C
17th 24.4°C 17.7°C
18th 24.3°C 19.8°C
19th 22.1°C 19.6°C
20th 20.3°C 17.9°C

Fitting this in with maximum DPs (and associated temperature) from Septembers over the last few years:

Year Temp Max DP Date
2013 20.0°C 18.0°C 21st
2012 24.2°C 18.3°C 3rd
2011 27.2°C 20.2°C 29th
2010 21.2°C 16.1°C 10th
2009 22.6°C 16.8°C 7th
2008 20.1°C 14.9°C 14th
2007 25.1°C 17.9°C 7th
2006 23.5°C 19.3°C 3rd

So recent DPs of +19°C are not common for September. Caveat here is that prior to 2012 the values quoted are from my previous location 6 km inland up the valley and the climatology is probably a little less humid there. Up until 2012 the figures were determined by a wet & dry bulb hygrometer, since then the figures have been obtained from a Davis VP2+ but they generally agree.
Near Newton Poppleford, Sidmouth - Devon
50:41N 3:17 W; 20 metres AMSL; Station Grade B-BAAA37
http://www.ottervalley.co.uk
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Posts: 429
Joined: 2012 Jan 27, 17:25
Location: Rural riverside valley location near the village of Newton Poppleford and 2 km from the sea.


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