Viewing Station: IL-WL-178 : Mokena 2.1 SW
Mar 20, 2022 - Sep 22, 20261,353 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.65"
September 1-22, 2026(11 of 22 days covered by obs)
NOAA Normal
2.50"
Departure from Normal
0.15" : 106% of Normal
Year-To-Date: 29.27"
Jan 1 to Sep 22, 2026(209 of 265 days covered by obs)
NOAA Normal
30.07"
Departure from Normal
-0.80" : 97% of Normal
Water Year-To-Date: 34.08"
Oct 1, 2025 to Sep 22, 2026(266 of 357 days covered by obs)
NOAA Normal
38.31"
Departure from Normal
-4.23" : 89% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.14
2.15
-0.01
Feb
1.89
1.96
-0.07
Mar
2.42
2.34
0.08
Apr
3.81
3.78
0.03
May
4.56
4.58
-0.02
Jun
4.49
4.45
0.04
Jul
4.23
4.39
-0.16
Aug
4.03
3.97
0.06
Sep
3.41
3.37
0.04
Oct
3.40
3.36
0.04
Nov
2.65
2.62
0.03
Dec
2.19
2.16
0.03
39.22
39.13
0.09