Viewing Station: IL-HY-15 : Coal Valley 2.6 E
Aug 6, 2017 - Sep 17, 20262,706 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.94"
September 1-17, 2026(11 of 17 days covered by obs)
NOAA Normal
1.97"
Departure from Normal
-0.03" : 99% of Normal
Year-To-Date: 29.22"
Jan 1 to Sep 17, 2026(208 of 260 days covered by obs)
NOAA Normal
28.79"
Departure from Normal
0.43" : 102% of Normal
Water Year-To-Date: 33.74"
Oct 1, 2025 to Sep 17, 2026(285 of 352 days covered by obs)
NOAA Normal
35.83"
Departure from Normal
-2.09" : 94% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.50
1.53
-0.03
Feb
1.72
1.75
-0.03
Mar
2.45
2.43
0.02
Apr
3.73
3.63
0.10
May
4.68
4.80
-0.12
Jun
4.84
4.61
0.23
Jul
4.03
4.17
-0.14
Aug
3.87
3.83
0.04
Sep
3.47
3.47
0.00
Oct
2.79
2.78
0.01
Nov
2.32
2.26
0.06
Dec
1.93
2.01
-0.08
37.33
37.27
0.06