The 10 Coldest Nights of 2015 [degs C]

10.  0.7   February 17
9.   -0.3   January 22
8.   -0.7   February 6
7.   -1.0   February 5
6.   -1.1   January 19
5.   -1.2   February 8
4.   -1.5   February 3
3.   -1.6   January 17
=1. -1.8   February 2, February 4