Viewing Station: IL-MCL-2 : Arrowsmith 1.7 NNE
Apr 25, 2007 - Sep 22, 20267,285 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.53"
September 1-23, 2026(22 of 23 days covered by obs)
NOAA Normal
2.48"
Departure from Normal
-0.95" : 62% of Normal
Year-To-Date: 36.44"
Jan 1 to Sep 23, 2026(265 of 266 days covered by obs)
NOAA Normal
29.52"
Departure from Normal
6.92" : 123% of Normal
Water Year-To-Date: 40.03"
Oct 1, 2025 to Sep 23, 2026(357 of 358 days covered by obs)
NOAA Normal
37.84"
Departure from Normal
2.19" : 106% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.18
2.14
0.04
Feb
1.86
1.83
0.03
Mar
2.64
2.53
0.11
Apr
3.80
3.63
0.17
May
4.41
4.38
0.03
Jun
4.31
4.12
0.19
Jul
4.20
3.87
0.33
Aug
3.64
3.33
0.31
Sep
3.23
3.25
-0.02
Oct
3.22
3.19
0.03
Nov
2.89
2.63
0.26
Dec
2.21
2.17
0.04
38.59
37.07
1.52