Viewing Station: IA-BC-9 : Winthrop 5.6 NNE
Apr 12, 2018 - Sep 18, 20263,383 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 3.32"
September 1-18, 2026(18 of 18 days covered by obs)
NOAA Normal
2.21"
Departure from Normal
1.11" : 150% of Normal
Year-To-Date: 39.37"
Jan 1 to Sep 18, 2026(260 of 261 days covered by obs)
NOAA Normal
29.72"
Departure from Normal
9.65" : 132% of Normal
Water Year-To-Date: 42.98"
Oct 1, 2025 to Sep 18, 2026(352 of 353 days covered by obs)
NOAA Normal
36.34"
Departure from Normal
6.64" : 118% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.17
1.11
0.06
Feb
1.26
1.21
0.05
Mar
2.11
1.98
0.13
Apr
3.76
3.74
0.02
May
4.63
4.68
-0.05
Jun
5.86
5.81
0.05
Jul
4.62
4.89
-0.27
Aug
4.10
4.11
-0.01
Sep
3.69
3.63
0.06
Oct
2.91
2.85
0.06
Nov
2.08
2.02
0.06
Dec
1.63
1.53
0.10
37.82
37.56
0.26