Viewing Station: AL-JF-87 : Helena 1.7 NNW
Oct 1, 2024 - Sep 20, 2026651 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.91"
September 1-20, 2026(18 of 20 days covered by obs)
NOAA Normal
2.66"
Departure from Normal
-0.75" : 72% of Normal
Year-To-Date: 45.53"
Jan 1 to Sep 20, 2026(239 of 263 days covered by obs)
NOAA Normal
41.39"
Departure from Normal
4.14" : 110% of Normal
Water Year-To-Date: 53.80"
Oct 1, 2025 to Sep 20, 2026(328 of 355 days covered by obs)
NOAA Normal
54.23"
Departure from Normal
-0.43" : 99% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
5.25
5.23
0.02
Feb
5.42
5.35
0.07
Mar
5.33
5.25
0.08
Apr
4.98
5.13
-0.15
May
4.17
4.27
-0.10
Jun
4.64
4.65
-0.01
Jul
4.86
4.50
0.36
Aug
4.08
4.33
-0.25
Sep
3.99
4.11
-0.12
Oct
3.34
3.31
0.03
Nov
4.53
4.47
0.06
Dec
4.97
5.10
-0.13
55.56
55.70
-0.14