Viewing Station: IL-LK-54 : Mundelein 0.5 NNE
Jul 8, 2010 - Sep 21, 20264,377 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.71"
September 1-22, 2026(20 of 22 days covered by obs)
NOAA Normal
2.51"
Departure from Normal
2.20" : 188% of Normal
Year-To-Date: 33.48"
Jan 1 to Sep 22, 2026(234 of 265 days covered by obs)
NOAA Normal
28.38"
Departure from Normal
5.10" : 118% of Normal
Water Year-To-Date: 37.58"
Oct 1, 2025 to Sep 22, 2026(314 of 357 days covered by obs)
NOAA Normal
36.03"
Departure from Normal
1.55" : 104% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.84
1.90
-0.06
Feb
1.74
1.89
-0.15
Mar
2.24
2.31
-0.07
Apr
3.82
3.74
0.08
May
4.21
4.45
-0.24
Jun
4.49
4.37
0.12
Jul
3.74
3.73
0.01
Aug
3.79
3.70
0.09
Sep
3.42
3.44
-0.02
Oct
3.19
3.20
-0.01
Nov
2.45
2.40
0.05
Dec
2.01
2.07
-0.06
36.94
37.20
-0.26