Viewing Station: IL-CK-296 : Chicago Heights 2.4 NNW
Jul 28, 2017 - Sep 28, 20263,021 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.31"
September 1-29, 2026(28 of 29 days covered by obs)
NOAA Normal
3.27"
Departure from Normal
1.04" : 132% of Normal
Year-To-Date: 47.52"
Jan 1 to Sep 29, 2026(271 of 272 days covered by obs)
NOAA Normal
30.38"
Departure from Normal
17.14" : 156% of Normal
Water Year-To-Date: 56.31"
Oct 1, 2025 to Sep 29, 2026(363 of 364 days covered by obs)
NOAA Normal
38.66"
Departure from Normal
17.65" : 146% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.22
2.26
-0.04
Feb
1.93
2.02
-0.09
Mar
2.39
2.43
-0.04
Apr
3.78
3.78
0.00
May
4.33
4.50
-0.17
Jun
4.40
4.54
-0.14
Jul
4.15
4.38
-0.23
Aug
3.91
4.03
-0.12
Sep
3.38
3.31
0.07
Oct
3.43
3.50
-0.07
Nov
2.70
2.75
-0.05
Dec
2.15
2.26
-0.11
38.77
39.76
-0.99