Viewing Station: IL-WL-42 : Mokena 1.3 W
Apr 7, 2008 - May 27, 20263,154 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.52"
May 1-27, 2026(26 of 27 days covered by obs)
NOAA Normal
3.97"
Departure from Normal
-2.45" : 38% of Normal
Year-To-Date: 16.18"
Jan 1 to May 27, 2026(144 of 147 days covered by obs)
NOAA Normal
14.23"
Departure from Normal
1.95" : 114% of Normal
Water Year-To-Date: 21.75"
Oct 1, 2025 to May 27, 2026(234 of 239 days covered by obs)
NOAA Normal
22.47"
Departure from Normal
-0.72" : 97% 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
2.35
0.07
Apr
3.81
3.80
0.01
May
4.56
4.61
-0.05
Jun
4.49
4.43
0.06
Jul
4.23
4.34
-0.11
Aug
4.03
3.98
0.05
Sep
3.41
3.35
0.06
Oct
3.40
3.38
0.02
Nov
2.65
2.61
0.04
Dec
2.19
2.17
0.02
39.22
39.13
0.09