Viewing Station: IL-LG-15 : Chestnut 1.9 W
Mar 20, 2008 - Sep 22, 20265,454 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.05"
September 1-22, 2026(22 of 22 days covered by obs)
NOAA Normal
2.28"
Departure from Normal
-0.23" : 90% of Normal
Year-To-Date: 30.50"
Jan 1 to Sep 22, 2026(263 of 265 days covered by obs)
NOAA Normal
29.31"
Departure from Normal
1.19" : 104% of Normal
Water Year-To-Date: 32.60"
Oct 1, 2025 to Sep 22, 2026(336 of 357 days covered by obs)
NOAA Normal
37.83"
Departure from Normal
-5.23" : 86% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.19
2.17
0.02
Feb
1.98
2.04
-0.06
Mar
2.75
2.70
0.05
Apr
3.92
3.93
-0.01
May
4.47
4.36
0.11
Jun
4.28
4.30
-0.02
Jul
4.08
4.21
-0.13
Aug
3.36
3.31
0.05
Sep
3.11
2.98
0.13
Oct
3.28
3.29
-0.01
Nov
2.98
2.86
0.12
Dec
2.26
2.23
0.03
38.66
38.38
0.28