Montana 18-Month Period Ending in December Precipitation
Inches
1901-1953
-99
189612
29.11
2.49
189712
31.34
4.72
189812
30.02
3.40
189912
27.85
1.23
190012
26.26
-0.36
190112
27.27
0.65
190212
26.69
0.07
190312
26.26
-0.36
190412
24.18
-2.44
190512
20.81
-5.81
190612
28.59
1.97
190712
29.58
2.96
190812
27.17
0.55
190912
29.39
2.77
191012
27.26
0.64
191112
29.43
2.81
191212
30.46
3.84
191312
28.56
1.94
191412
26.04
-0.58
191512
29.58
2.96
191612
33.46
6.84
191712
27.06
0.44
191812
24.68
-1.94
191912
22.49
-4.13
192012
24.85
-1.77
192112
24.46
-2.16
192212
26.49
-0.13
192312
28.99
2.37
192412
27.15
0.53
192512
27.79
1.17
192612
25.69
-0.93
192712
35.83
9.21
192812
29.18
2.56
192912
25.11
-1.51
193012
23.43
-3.19
193112
20.17
-6.45
193212
27.03
0.41
193312
27.72
1.10
193412
24.17
-2.45
193512
19.83
-6.79
193612
19.31
-7.31
193712
21.77
-4.85
193812
27.96
1.34
193912
23.85
-2.77
194012
24.32
-2.30
194112
29.29
2.67
194212
31.71
5.09
194312
27.05
0.43
194412
24.43
-2.19
194512
24.06
-2.56
194612
28.91
2.29
194712
31.37
4.75
194812
29.77
3.15
194912
23.77
-2.85
195012
27.35
0.73
195112
30.03
3.41
195212
24.29
-2.33
195312
24.89
-1.73