Thursday 12 December 2013

November 2013 Summary

In Brief:
Wet and mild for the first half of the month, then dry with average temperatures for most of the remainder.  A windy, showery spell during the third week, and then briefly colder.
Very high pressure for the second and fourth weeks.

Temperature: [Minimum]:
On the night of the 25th/26th the temperature dropped to 2.7 degs C, making it the coldest November night for three years.  On the night of 31st October/1st November the temperature did not fall below 15.6 degs C, making it the warmest November night ever at this location*,  beating the 15.3 degs set in 2005 into second place.  Thus the exceptionally mild nights of October continued into the beginning of November.
The average night-time temperature for November 2013 was 9.67 degs C, the second highest since at least 2003, behind 2011's 10.22 degs C.
The temperature fell below 5 degs C on 4 nights, the most for November for three years.

Temperature: [Maximum]:
Daytime temperatures ranged from 8.3 degs C on the 25th to 19.0 degs C on the 11th.  This was the warmest November day ever at this location*, beating 18.4, set in 2007, into second place.  
Due to the cooler second half of the month however, the average daytime temperature for November 2013 stands at 13.41 degs C, which is the fifth lowest since 2003.

Rainfall:
A total of 107.7 mm of rain fell during November 2013, making it the third driest November since 2008. This total was less than half of that of November 2012 [217.8 mm], and a little over half of that of October 2013 [214.4 mm].
Most of the rainfall total had fallen by the 14th, with just 7.4 mm after that.  The wettest spell was over the Remembrance weekend, when 53.6 mm fell between the 8th and 11th, although the wettest day itself was the 3rd, with 22.2 mm. 

Cumulatively, 1055.5 mm of rain has fallen in 2013 to the end of November.  This compares to 1213.7 mm during the same period in 2012 [-13%]. 
Note that up to the end of March however, 322.3 mm of rain had fallen in 2013, compared to just 141.4 mm during the same period in 2012. 
This means that looking at the period April 1st to November 30th, 733.2 mm of rain fell in 2013, compared to 1072.3 mm during the same period in 2012 [-31.6%]!

  
*Since at least 2003.

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