Viewing Station: IL-WL-103 : Joliet 1.8 NNE
May 18, 2012 - Sep 10, 20261,641 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.37"
September 1-13, 2026(10 of 13 days covered by obs)
NOAA Normal
1.44"
Departure from Normal
-1.07" : 26% of Normal
Year-To-Date: 36.27"
Jan 1 to Sep 13, 2026(253 of 256 days covered by obs)
NOAA Normal
28.48"
Departure from Normal
7.79" : 127% of Normal
Water Year-To-Date: 41.74"
Oct 1, 2025 to Sep 13, 2026(345 of 348 days covered by obs)
NOAA Normal
36.54"
Departure from Normal
5.20" : 114% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.04
2.06
-0.02
Feb
1.79
1.88
-0.09
Mar
2.34
2.40
-0.06
Apr
3.81
3.85
-0.04
May
4.50
4.64
-0.14
Jun
4.42
4.49
-0.07
Jul
4.14
4.21
-0.07
Aug
4.00
3.97
0.03
Sep
3.32
3.28
0.04
Oct
3.34
3.32
0.02
Nov
2.60
2.47
0.13
Dec
2.12
2.11
0.01
38.42
38.68
-0.26