Viewing Station: IL-MCH-87 : Marengo 0.7 NNE
Nov 26, 2017 - Sep 21, 20263,276 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 3.92"
September 1-22, 2026(20 of 22 days covered by obs)
NOAA Normal
2.51"
Departure from Normal
1.41" : 156% of Normal
Year-To-Date: 28.64"
Jan 1 to Sep 22, 2026(263 of 265 days covered by obs)
NOAA Normal
28.92"
Departure from Normal
-0.28" : 99% of Normal
Water Year-To-Date: 33.88"
Oct 1, 2025 to Sep 22, 2026(354 of 357 days covered by obs)
NOAA Normal
36.19"
Departure from Normal
-2.31" : 94% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.69
1.69
0.00
Feb
1.61
1.70
-0.09
Mar
2.17
2.27
-0.10
Apr
3.72
3.72
0.00
May
4.50
4.51
-0.01
Jun
4.79
4.91
-0.12
Jul
3.98
3.92
0.06
Aug
3.95
3.98
-0.03
Sep
3.42
3.54
-0.12
Oct
2.96
2.78
0.18
Nov
2.38
2.37
0.01
Dec
1.93
1.95
-0.02
37.10
37.34
-0.24