Viewing Station: IL-CK-296 : Chicago Heights 2.4 NNW
Jul 28, 2017 - Sep 11, 20252,661 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.06"
September 1-18, 2025(11 of 18 days covered by obs)
NOAA Normal
2.03"
Departure from Normal
-1.97" : 3% of Normal
Year-To-Date: 26.29"
Jan 1 to Sep 18, 2025(254 of 261 days covered by obs)
NOAA Normal
29.14"
Departure from Normal
-2.85" : 90% of Normal
Water Year-To-Date: 33.57"
Oct 1, 2024 to Sep 18, 2025(344 of 353 days covered by obs)
NOAA Normal
37.42"
Departure from Normal
-3.85" : 90% 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