Viewing Station: IL-LK-39 : Riverwoods 0.4 ENE
Apr 12, 2008 - Dec 15, 20255,933 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.63"
December 1-16, 2025(15 of 16 days covered by obs)
NOAA Normal
1.06"
Departure from Normal
-0.43" : 60% of Normal
Year-To-Date: 27.43"
Jan 1 to Dec 16, 2025(341 of 350 days covered by obs)
NOAA Normal
36.01"
Departure from Normal
-8.58" : 76% of Normal
Water Year-To-Date: 5.76"
Oct 1, 2025 to Dec 16, 2025(76 of 77 days covered by obs)
NOAA Normal
6.71"
Departure from Normal
-0.95" : 86% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.88
1.98
-0.10
Feb
1.77
1.90
-0.13
Mar
2.22
2.26
-0.04
Apr
3.74
3.70
0.04
May
4.32
4.44
-0.12
Jun
4.47
4.25
0.22
Jul
3.78
3.62
0.16
Aug
3.78
3.80
-0.02
Sep
3.34
3.31
0.03
Oct
3.20
3.28
-0.08
Nov
2.45
2.41
0.04
Dec
2.05
2.09
-0.04
37.00
37.04
-0.04