Viewing Station: IL-CK-438 : Chicago 5.9 SW
Apr 26, 2025 - Sep 26, 2026403 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.27"
September 1-27, 2026(25 of 27 days covered by obs)
NOAA Normal
2.93"
Departure from Normal
1.34" : 146% of Normal
Year-To-Date: 25.24"
Jan 1 to Sep 27, 2026(172 of 270 days covered by obs)
NOAA Normal
28.87"
Departure from Normal
-3.63" : 87% of Normal
Water Year-To-Date: 32.71"
Oct 1, 2025 to Sep 27, 2026(264 of 362 days covered by obs)
NOAA Normal
36.90"
Departure from Normal
-4.19" : 89% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.99
2.22
-0.23
Feb
1.76
2.02
-0.26
Mar
2.27
2.34
-0.07
Apr
3.75
3.84
-0.09
May
4.31
4.41
-0.10
Jun
4.16
4.41
-0.25
Jul
3.59
3.84
-0.25
Aug
4.11
4.04
0.07
Sep
3.25
3.26
-0.01
Oct
3.48
3.59
-0.11
Nov
2.50
2.66
-0.16
Dec
2.05
2.30
-0.25
37.22
38.93
-1.71