Thursday 12 January 2017

December 2016 Summary

In Brief:
A very dry month for winter due to almost persistant high pressure, the favourable positions of which ensured there was little cold weather that this would normally bring in winter, but instead gave near average temperatures.

Temperature: [Minimum]:
Lowest:  1.4 degs C on the 18th.
Highest:  12.7 degs C on the 8th.
Average minimum:  7.0 degs C.
All preceding figures are higher than those for November 2016.
Nights with temperature below 5 degs C = 10.
Nights with temperature below 0 degs C = 0.   Last time in December: 2014.

Temperature: [Maximum]:
Lowest:  8.5 degs C on the 20th.  Higher than November 2016, and there has been a colder day than this during every December since at least 2003, except for 2007, 2013 and 2015.
Highest:  14.6 degs C on the 7th.
Average maximum:  11.35 degs C.  November 2016 = 11.31.

Rainfall:
Total:  61.7 mm.  2nd driest December since 2008 and driest month since July 2016.
November 2016:  137.9 mm.
December 2015:  154.1 mm.

Wettest day:  19.8 mm on the 10th.  Lowest max since July 2016.
Only other day with  >5 mm:  21st:  8.5 mm.
Only 1.1 mm before 8th.
No measurable rain after 26th.

Completely dry days:  12.
Days with no measurable rain:  16.


Cumulatively:  2016: 1239.1 mm. [4th wettest calendar year since at least 2008, after 2009, 2012 and 2014 - was 2nd wettest up to end November].
2015:  1214 mm [+2.07%].

Thunder:
None.

Pressure:
Lowest:  1012.4 on the 15th
Highest:  1045.6 on the 27th

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