Viewing Station: IL-DP-189 : Downers Grove 1.8 SSE
Aug 15, 2023 - Sep 17, 20261,157 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.05"
September 1-17, 2026(17 of 17 days covered by obs)
NOAA Normal
1.86"
Departure from Normal
0.19" : 110% of Normal
Year-To-Date: 38.97"
Jan 1 to Sep 17, 2026(260 of 260 days covered by obs)
NOAA Normal
29.01"
Departure from Normal
9.96" : 134% of Normal
Water Year-To-Date: 46.26"
Oct 1, 2025 to Sep 17, 2026(352 of 352 days covered by obs)
NOAA Normal
37.33"
Departure from Normal
8.93" : 124% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.02
2.15
-0.13
Feb
1.83
1.99
-0.16
Mar
2.41
2.36
0.05
Apr
3.88
3.92
-0.04
May
4.58
4.71
-0.13
Jun
4.44
4.45
-0.01
Jul
3.85
3.91
-0.06
Aug
4.14
4.04
0.10
Sep
3.29
3.25
0.04
Oct
3.54
3.55
-0.01
Nov
2.61
2.65
-0.04
Dec
2.17
2.22
-0.05
38.76
39.20
-0.44