Viewing Station: IA-LY-10 : Rock Rapids 7.7 WNW
Aug 20, 2018 - Sep 15, 2025297 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.17"
September 1-15, 2025(3 of 15 days covered by obs)
NOAA Normal
1.59"
Departure from Normal
-0.42" : 74% of Normal
Year-To-Date: 22.05"
Jan 1 to Sep 15, 2025(42 of 258 days covered by obs)
NOAA Normal
22.50"
Departure from Normal
-0.45" : 98% of Normal
Water Year-To-Date: 24.92"
Oct 1, 2024 to Sep 15, 2025(46 of 350 days covered by obs)
NOAA Normal
26.92"
Departure from Normal
-2.00" : 93% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
0.66
0.66
0.00
Feb
0.80
0.78
0.02
Mar
1.45
1.50
-0.05
Apr
2.88
2.96
-0.08
May
3.93
3.79
0.14
Jun
4.74
4.70
0.04
Jul
3.40
3.46
-0.06
Aug
3.05
3.31
-0.26
Sep
3.18
3.09
0.09
Oct
2.27
2.25
0.02
Nov
1.30
1.40
-0.10
Dec
0.85
0.91
-0.06
28.51
28.81
-0.30