Viewing Station: IL-CK-306 : Oak Forest 0.6 N
Mar 29, 2018 - Sep 18, 20263,022 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.37"
September 1-19, 2026(18 of 19 days covered by obs)
NOAA Normal
2.13"
Departure from Normal
0.24" : 111% of Normal
Year-To-Date: 43.79"
Jan 1 to Sep 19, 2026(261 of 262 days covered by obs)
NOAA Normal
29.51"
Departure from Normal
14.28" : 148% of Normal
Water Year-To-Date: 51.29"
Oct 1, 2025 to Sep 19, 2026(350 of 354 days covered by obs)
NOAA Normal
37.82"
Departure from Normal
13.47" : 136% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.16
2.20
-0.04
Feb
1.91
1.99
-0.08
Mar
2.43
2.40
0.03
Apr
3.84
3.83
0.01
May
4.49
4.54
-0.05
Jun
4.40
4.35
0.05
Jul
4.10
4.21
-0.11
Aug
4.05
4.06
-0.01
Sep
3.36
3.29
0.07
Oct
3.47
3.47
0.00
Nov
2.66
2.67
-0.01
Dec
2.18
2.25
-0.07
39.05
39.26
-0.21