Jan -3.5   -11    -7.2  -999 4 M1 O1a 100
Feb  0.3   -8.4   -4.1  -999 5 M1 O1a 100
Mar  5.3   -5     -0.2  -999 8 M1 O1a 100 
Apr  11.7  -1.4    5.2  -999 10 M1 O1a 80 
May  16.4   2.5    9.5  -999 11 M2 O1a 60 
Jun  20     6.1    13   -999 11 M2 O1a 40 
Jul  22.3   7.8    15.1 -999 10 M2 O1a 80 
Aug  21.5   7.5    14.5 -999 9 M2 O1a 60 
Sep  16.3   4.1    10.2 -999 9 M2 O1a 60 
Oct  9.8   -0.5    5.2  -999 9 M1 O1a 60 
Nov  1.3   -5.9   -2.3  -999 5 M1 O1a 100
Dec -2.8   -9.9   -6.4  -999 4 M1 O1a 100