Viewing Station: IL-CK-74 : Oak Park 1.3 NNE
Jul 9, 2007 - May 30, 20266,523 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.52"
May 1-31, 2026(30 of 31 days covered by obs)
NOAA Normal
4.47"
Departure from Normal
-2.95" : 34% of Normal
Year-To-Date: 14.80"
Jan 1 to May 31, 2026(150 of 151 days covered by obs)
NOAA Normal
14.30"
Departure from Normal
0.50" : 103% of Normal
Water Year-To-Date: 22.16"
Oct 1, 2025 to May 31, 2026(241 of 243 days covered by obs)
NOAA Normal
22.30"
Departure from Normal
-0.14" : 99% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.97
2.16
-0.19
Feb
1.81
1.98
-0.17
Mar
2.29
2.31
-0.02
Apr
3.76
3.88
-0.12
May
4.47
4.56
-0.09
Jun
4.28
4.35
-0.07
Jul
3.67
3.74
-0.07
Aug
3.95
3.99
-0.04
Sep
3.25
3.23
0.02
Oct
3.43
3.58
-0.15
Nov
2.49
2.67
-0.18
Dec
2.08
2.26
-0.18
37.45
38.71
-1.26