Viewing Station: IL-CK-458 : Chicago 3.3 S
Oct 13, 2025 - Oct 31, 202519 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.44"
October 1-31, 2025(19 of 31 days covered by obs)
NOAA Normal
3.49"
Departure from Normal
-2.05" : 41% of Normal
Year-To-Date: 1.44"
Jan 1 to Oct 31, 2025(19 of 304 days covered by obs)
NOAA Normal
32.66"
Departure from Normal
-31.22" : 4% of Normal
Water Year-To-Date: 1.44"
Oct 1, 2025 to Oct 31, 2025(19 of 31 days covered by obs)
NOAA Normal
3.49"
Departure from Normal
-2.05" : 41% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.00
2.38
-0.38
Feb
1.77
2.11
-0.34
Mar
2.27
2.30
-0.03
Apr
3.74
3.80
-0.06
May
4.34
4.49
-0.15
Jun
4.11
4.52
-0.41
Jul
3.60
4.01
-0.41
Aug
4.09
4.11
-0.02
Sep
3.25
3.35
-0.10
Oct
3.49
3.86
-0.37
Nov
2.51
2.66
-0.15
Dec
2.06
2.44
-0.38
37.23
40.03
-2.80