Viewing Station: IL-CK-152 : Chicago Ridge 0.2 WSW
Oct 25, 2009 - Sep 19, 20265,736 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 3.08"
September 1-19, 2026(17 of 19 days covered by obs)
NOAA Normal
2.07"
Departure from Normal
1.01" : 149% of Normal
Year-To-Date: 32.14"
Jan 1 to Sep 19, 2026(204 of 262 days covered by obs)
NOAA Normal
28.83"
Departure from Normal
3.31" : 111% of Normal
Water Year-To-Date: 37.10"
Oct 1, 2025 to Sep 19, 2026(282 of 354 days covered by obs)
NOAA Normal
37.03"
Departure from Normal
0.07" : 100% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.08
2.20
-0.12
Feb
1.85
1.99
-0.14
Mar
2.38
2.37
0.01
Apr
3.81
3.88
-0.07
May
4.46
4.57
-0.11
Jun
4.34
4.31
0.03
Jul
3.82
3.98
-0.16
Aug
4.02
4.05
-0.03
Sep
3.27
3.26
0.01
Oct
3.49
3.44
0.05
Nov
2.59
2.61
-0.02
Dec
2.12
2.29
-0.17
38.23
38.95
-0.72