Viewing Station: IL-MCH-87 : Marengo 0.7 NNE
Nov 26, 2017 - May 27, 20263,160 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.56"
May 1-27, 2026(27 of 27 days covered by obs)
NOAA Normal
3.92"
Departure from Normal
-3.36" : 14% of Normal
Year-To-Date: 12.40"
Jan 1 to May 27, 2026(147 of 147 days covered by obs)
NOAA Normal
13.11"
Departure from Normal
-0.71" : 95% of Normal
Water Year-To-Date: 17.64"
Oct 1, 2025 to May 27, 2026(238 of 239 days covered by obs)
NOAA Normal
20.38"
Departure from Normal
-2.74" : 87% 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