Viewing Station: IA-SR-12 : Ames 2.1 N
Aug 20, 2007 - May 20, 20263,547 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.66"
May 1-20, 2026(20 of 20 days covered by obs)
NOAA Normal
3.24"
Departure from Normal
-0.58" : 82% of Normal
Year-To-Date: 9.67"
Jan 1 to May 20, 2026(116 of 140 days covered by obs)
NOAA Normal
10.97"
Departure from Normal
-1.30" : 88% of Normal
Water Year-To-Date: 14.32"
Oct 1, 2025 to May 20, 2026(201 of 232 days covered by obs)
NOAA Normal
16.62"
Departure from Normal
-2.30" : 86% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.88
0.93
-0.05
Feb
1.04
1.14
-0.10
Mar
1.98
2.04
-0.06
Apr
3.83
3.65
0.18
May
5.02
5.06
-0.04
Jun
5.30
5.11
0.19
Jul
4.28
4.34
-0.06
Aug
4.39
4.51
-0.12
Sep
3.51
3.50
0.01
Oct
2.59
2.61
-0.02
Nov
1.74
1.83
-0.09
Dec
1.32
1.41
-0.09
35.88
36.13
-0.25