Viewing Station: IA-WH-1 : Decorah 7.9 ENE
Aug 1, 2007 - Sep 18, 20266,942 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.69"
September 1-18, 2026(18 of 18 days covered by obs)
NOAA Normal
2.25"
Departure from Normal
-0.56" : 75% of Normal
Year-To-Date: 30.50"
Jan 1 to Sep 18, 2026(261 of 261 days covered by obs)
NOAA Normal
29.81"
Departure from Normal
0.69" : 102% of Normal
Water Year-To-Date: 34.39"
Oct 1, 2025 to Sep 18, 2026(353 of 353 days covered by obs)
NOAA Normal
35.97"
Departure from Normal
-1.58" : 96% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.11
1.02
0.09
Feb
1.18
1.05
0.13
Mar
1.91
1.81
0.10
Apr
4.05
3.82
0.23
May
4.72
4.66
0.06
Jun
5.78
5.93
-0.15
Jul
4.52
4.35
0.17
Aug
4.29
4.18
0.11
Sep
3.75
3.56
0.19
Oct
2.71
2.69
0.02
Nov
2.01
1.80
0.21
Dec
1.44
1.32
0.12
37.47
36.19
1.28