Viewing Station: IA-ST-42 : Riverdale 0.5 N
Sep 18, 2017 - Aug 17, 20261,980 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.82"
August 1-17, 2026(17 of 17 days covered by obs)
NOAA Normal
2.19"
Departure from Normal
2.63" : 220% of Normal
Year-To-Date: 28.28"
Jan 1 to Aug 17, 2026(221 of 229 days covered by obs)
NOAA Normal
24.95"
Departure from Normal
3.33" : 113% of Normal
Water Year-To-Date: 34.29"
Oct 1, 2025 to Aug 17, 2026(313 of 321 days covered by obs)
NOAA Normal
31.84"
Departure from Normal
2.45" : 108% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.42
1.48
-0.06
Feb
1.66
1.73
-0.07
Mar
2.44
2.47
-0.03
Apr
3.69
3.61
0.08
May
4.68
4.79
-0.11
Jun
4.82
4.74
0.08
Jul
4.05
4.23
-0.18
Aug
3.99
3.85
0.14
Sep
3.44
3.36
0.08
Oct
2.79
2.75
0.04
Nov
2.25
2.21
0.04
Dec
1.85
1.96
-0.11
37.08
37.18
-0.10