Viewing Station: IL-CK-211 : Oak Lawn 1.6 WNW
Mar 4, 2013 - Sep 21, 20264,821 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 5.94"
September 1-22, 2026(21 of 22 days covered by obs)
NOAA Normal
2.38"
Departure from Normal
3.56" : 249% of Normal
Year-To-Date: 48.65"
Jan 1 to Sep 22, 2026(263 of 265 days covered by obs)
NOAA Normal
28.85"
Departure from Normal
19.80" : 169% of Normal
Water Year-To-Date: 55.80"
Oct 1, 2025 to Sep 22, 2026(355 of 357 days covered by obs)
NOAA Normal
37.00"
Departure from Normal
18.80" : 151% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.03
2.20
-0.17
Feb
1.81
1.99
-0.18
Mar
2.36
2.36
0.00
Apr
3.81
3.88
-0.07
May
4.43
4.54
-0.11
Jun
4.26
4.32
-0.06
Jul
3.71
3.92
-0.21
Aug
4.06
4.03
0.03
Sep
3.25
3.25
0.00
Oct
3.50
3.42
0.08
Nov
2.56
2.61
-0.05
Dec
2.09
2.29
-0.20
37.87
38.81
-0.94