Viewing Station: MT-LC-14 : Helena 2.0 NNW
Jun 15, 2013 - Sep 13, 20254,781 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.35"
September 1-13, 2025(13 of 13 days covered by obs)
NOAA Normal
0.50"
Departure from Normal
-0.15" : 70% of Normal
Year-To-Date: 10.81"
Jan 1 to Sep 13, 2025(255 of 256 days covered by obs)
NOAA Normal
10.18"
Departure from Normal
0.63" : 106% of Normal
Water Year-To-Date: 11.95"
Oct 1, 2024 to Sep 13, 2025(345 of 348 days covered by obs)
NOAA Normal
12.35"
Departure from Normal
-0.40" : 97% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.39
0.45
-0.06
Feb
0.46
0.47
-0.01
Mar
0.73
0.56
0.17
Apr
1.36
1.05
0.31
May
2.10
1.89
0.21
Jun
2.39
2.25
0.14
Jul
1.17
1.10
0.07
Aug
1.08
1.10
-0.02
Sep
1.15
1.00
0.15
Oct
0.99
0.89
0.10
Nov
0.69
0.58
0.11
Dec
0.49
0.49
0.00
13.00
11.83
1.17