Viewing Station: IL-WL-103 : Joliet 1.8 NNE
May 18, 2012 - Sep 13, 20251,281 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.39"
September 1-15, 2025(13 of 15 days covered by obs)
NOAA Normal
1.66"
Departure from Normal
-1.27" : 23% of Normal
Year-To-Date: 28.13"
Jan 1 to Sep 15, 2025(256 of 258 days covered by obs)
NOAA Normal
28.70"
Departure from Normal
-0.57" : 98% of Normal
Water Year-To-Date: 34.27"
Oct 1, 2024 to Sep 15, 2025(348 of 350 days covered by obs)
NOAA Normal
36.76"
Departure from Normal
-2.49" : 93% 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