Viewing Station: IL-CK-384 : Chicago 3.6 NNW
Apr 1, 2022 - Sep 8, 20261,224 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.20"
September 1-18, 2026(8 of 18 days covered by obs)
NOAA Normal
1.96"
Departure from Normal
-1.76" : 10% of Normal
Year-To-Date: 34.19"
Jan 1 to Sep 18, 2026(248 of 261 days covered by obs)
NOAA Normal
28.03"
Departure from Normal
6.16" : 122% of Normal
Water Year-To-Date: 43.52"
Oct 1, 2025 to Sep 18, 2026(340 of 353 days covered by obs)
NOAA Normal
36.07"
Departure from Normal
7.45" : 121% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.01
2.20
-0.19
Feb
1.83
2.06
-0.23
Mar
2.24
2.26
-0.02
Apr
3.73
3.78
-0.05
May
4.45
4.49
-0.04
Jun
4.23
4.47
-0.24
Jul
3.69
3.90
-0.21
Aug
3.89
4.05
-0.16
Sep
3.27
3.31
-0.04
Oct
3.42
3.67
-0.25
Nov
2.52
2.65
-0.13
Dec
2.10
2.31
-0.21
37.38
39.15
-1.77