Viewing Station: IL-CK-139 : Oak Lawn 1.1 N
Apr 26, 2009 - Aug 23, 20264,180 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 6.98"
August 1-23, 2026(23 of 23 days covered by obs)
NOAA Normal
3.01"
Departure from Normal
3.97" : 232% of Normal
Year-To-Date: 35.23"
Jan 1 to Aug 23, 2026(231 of 235 days covered by obs)
NOAA Normal
25.42"
Departure from Normal
9.81" : 139% of Normal
Water Year-To-Date: 40.58"
Oct 1, 2025 to Aug 23, 2026(323 of 327 days covered by obs)
NOAA Normal
33.57"
Departure from Normal
7.01" : 121% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.03
2.19
-0.16
Feb
1.81
1.99
-0.18
Mar
2.36
2.36
0.00
Apr
3.81
3.86
-0.05
May
4.43
4.51
-0.08
Jun
4.26
4.31
-0.05
Jul
3.71
3.89
-0.18
Aug
4.06
4.02
0.04
Sep
3.25
3.25
0.00
Oct
3.50
3.43
0.07
Nov
2.56
2.61
-0.05
Dec
2.09
2.28
-0.19
37.87
38.70
-0.83