September 2017 Summary

In Brief:
Cool, specially by day, and very wet.  Longest fine spell: 3 days.


Temperature: [Minimum]:
Lowest:  7.3 degs C on the 22nd.  Coldest September night since 2010.
Highest:  15.9 degs C on the 5th.  Equal to August's night-time max.
Average minimum:  11.49 degs C.  2nd lowest of the last 14 Septembers.  Lowest = 2015 [11.22].
Nights with temperature below 5 degs C = 0.
Nights with temperature below 0 degs C = 0.

Temperature: [Maximum]:
Lowest:  12.0 degs C on the 16th.  Coldest September day since at least 2003.  Previously 14.4 in 2007.
Highest:  19.2 degs C on the 6th.  Lowest September max since at least 2003.  Previously 20.6 in 2015.
Average maximum:  17.03 degs C.  Coldest of the last 14 Septembers.  Previously 18.07 in 2015.
Days with temperature above 20 degs C = 0.  First time in September since at least 2003. 
Days with temperature above 25 degs C = 0. 

Rainfall:
Total: 152.6 mm.  Wettest month since February 2016.  Wettest September since at least 2007.
August 2017:  87.4 mm.
September 2016:  146.8 mm.

Wettest day:  38.8 mm on the 3rd.  Wettest day since 24 October 2016.  Wettest September day since at least 2007.
Other days with >10 mm: 21.0 mm [16th]; 11.3 [29th]; 11.0 [27th];  10.8 [30th]. 

Driest spells:  No measurable rain 17th to 19th.
Completely dry days:  4.  Days with no measurable rain:  8.  Both fewest since February 2017 and fewest for September since at least 2007.
Cumulatively:  2017:  817.9 mm.
2016:  948.9 mm.  [-13.81%].

Thunder:
None.

Pressure:
Lowest:  997.0 mb on the 11th.  
Highest: 1028.0 mb on the 1st/2nd.