Viewing Station: IL-WN-40 : Rockford 4.5 WSW
Dec 2, 2018 - Sep 15, 20252,422 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.33"
September 1-15, 2025(15 of 15 days covered by obs)
NOAA Normal
1.81"
Departure from Normal
-1.48" : 18% of Normal
Year-To-Date: 20.50"
Jan 1 to Sep 15, 2025(257 of 258 days covered by obs)
NOAA Normal
28.11"
Departure from Normal
-7.61" : 73% of Normal
Water Year-To-Date: 25.30"
Oct 1, 2024 to Sep 15, 2025(349 of 350 days covered by obs)
NOAA Normal
35.14"
Departure from Normal
-9.84" : 72% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.60
1.60
0.00
Feb
1.64
1.65
-0.01
Mar
2.25
2.17
0.08
Apr
3.74
3.60
0.14
May
4.21
4.27
-0.06
Jun
5.15
5.28
-0.13
Jul
3.85
3.73
0.12
Aug
3.86
4.02
-0.16
Sep
3.61
3.51
0.10
Oct
2.79
2.80
-0.01
Nov
2.31
2.24
0.07
Dec
1.93
1.96
-0.03
36.94
36.83
0.11