Viewing Station: IL-WL-100 : Joliet 2.9 WNW
Jul 31, 2012 - Sep 23, 20264,528 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 5.03"
September 1-23, 2026(23 of 23 days covered by obs)
NOAA Normal
2.48"
Departure from Normal
2.55" : 202% of Normal
Year-To-Date: 41.95"
Jan 1 to Sep 23, 2026(266 of 266 days covered by obs)
NOAA Normal
29.40"
Departure from Normal
12.55" : 143% of Normal
Water Year-To-Date: 47.58"
Oct 1, 2025 to Sep 23, 2026(358 of 358 days covered by obs)
NOAA Normal
37.31"
Departure from Normal
10.27" : 128% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.01
2.05
-0.04
Feb
1.74
1.87
-0.13
Mar
2.32
2.36
-0.04
Apr
3.76
3.83
-0.07
May
4.57
4.60
-0.03
Jun
4.43
4.45
-0.02
Jul
4.12
4.17
-0.05
Aug
3.97
3.91
0.06
Sep
3.24
3.29
-0.05
Oct
3.28
3.29
-0.01
Nov
2.55
2.49
0.06
Dec
2.08
2.11
-0.03
38.07
38.42
-0.35