Viewing Station: IA-WH-1 : Decorah 7.9 ENE
Aug 1, 2007 - May 20, 20266,817 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.79"
May 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
3.05"
Departure from Normal
-1.26" : 59% of Normal
Year-To-Date: 14.25"
Jan 1 to May 20, 2026(140 of 140 days covered by obs)
NOAA Normal
11.30"
Departure from Normal
2.95" : 126% of Normal
Water Year-To-Date: 18.14"
Oct 1, 2025 to May 20, 2026(232 of 232 days covered by obs)
NOAA Normal
17.46"
Departure from Normal
0.68" : 104% 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