December 2017 Summary

In Brief:
Wet and rather cold.  Little fine weather.

Temperature: [Minimum]:
Lowest:  1.2 degs C on the 12th.
Highest:  10.2 degs C on the 22nd.  Every December since 2006 has had a milder night than this.
Average minimum:  5.88 degs C.  6th coldest of the last 15 Decembers. 
Nights with temperature below 5 degs C = 14. 
Nights with temperature below 0 degs C = 0.  Last time below zero in December = 2014.

Temperature: [Maximum]:
Lowest:  6.7 degs C on the 11th.
Highest:  13.3 degs C on the 30th.  Every December since 2003, exc 2014, had a milder day than this.
Average maximum:  10.2 degs C.  2nd coldest of the last 15 Decembers.  Coldest = 2010.
Days with temperature above 20 degs C = 0.
Days with temperature above 25 degs C = 0. 

Rainfall:
Total: 187.2 mm.  Wettest month since February 2016.  Wettest December since 2012 and 3rd wettest of the last 10.
November 2017:  62.7 mm.
December 2016:  61.7 mm.

Wettest day:  30.7 mm on the 30th.  Wettest day since September.  Wettest December day since 2012.
Other days with >20 mm: 24.8 mm [10th].   9 days with 10 mm or more.
Wettest spells: 7th to 14th: 73.3 mm; and 25th to 31st: 87.7 mm.  
Driest spells:  1st to 5th: 3 mm; and 18th to 21st: 1 mm.
Completely dry days:  3.  Fewest since November 2015.
Days with no measurable rain:  6.  Fewest since January 2016.
Cumulatively:  2017 total:  1149.8 mm.
2016:  1239.1 mm.  [-7.2%].

Thunder:
Thunder occurred on the 13th, 27th and 29th.

Pressure:
Lowest:  974.4 mb on the 10th/11th.  
Highest: 1042.6 mb on the 21st.