Viewing Station: IL-CK-458 : Chicago 3.3 S
Oct 13, 2025 - Sep 11, 2026209 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.15"
September 1-11, 2026(11 of 11 days covered by obs)
NOAA Normal
1.19"
Departure from Normal
-0.04" : 97% of Normal
Year-To-Date: 35.50"
Jan 1 to Sep 11, 2026(245 of 254 days covered by obs)
NOAA Normal
27.11"
Departure from Normal
8.39" : 131% of Normal
Water Year-To-Date: 39.89"
Oct 1, 2025 to Sep 11, 2026(322 of 346 days covered by obs)
NOAA Normal
35.17"
Departure from Normal
4.72" : 113% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.00
2.38
-0.38
Feb
1.77
2.11
-0.34
Mar
2.27
2.30
-0.03
Apr
3.74
3.80
-0.06
May
4.34
4.49
-0.15
Jun
4.11
4.52
-0.41
Jul
3.60
4.01
-0.41
Aug
4.09
4.11
-0.02
Sep
3.25
3.35
-0.10
Oct
3.49
3.86
-0.37
Nov
2.51
2.66
-0.15
Dec
2.06
2.44
-0.38
37.23
40.03
-2.80