Viewing Station: MT-LC-11 : Helena 9.3 NNE
May 22, 2012 - May 7, 2026485 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.06"
May 1-7, 2026(2 of 7 days covered by obs)
NOAA Normal
0.45"
Departure from Normal
-0.39" : 13% of Normal
Year-To-Date: 0.36"
Jan 1 to May 7, 2026(6 of 127 days covered by obs)
NOAA Normal
2.87"
Departure from Normal
-2.51" : 13% of Normal
Water Year-To-Date: 0.62"
Oct 1, 2025 to May 7, 2026(11 of 219 days covered by obs)
NOAA Normal
4.59"
Departure from Normal
-3.97" : 14% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.31
0.37
-0.06
Feb
0.38
0.39
-0.01
Mar
0.54
0.43
0.11
Apr
1.19
0.91
0.28
May
1.99
1.75
0.24
Jun
2.37
2.27
0.10
Jul
1.07
0.97
0.10
Aug
1.04
0.99
0.05
Sep
1.05
0.90
0.15
Oct
0.86
0.70
0.16
Nov
0.47
0.54
-0.07
Dec
0.39
0.41
-0.02
11.66
10.63
1.03