Viewing Station: IL-SG-45 : Chatham 1.5 E
May 30, 2014 - Sep 15, 20254,028 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.14"
September 1-15, 2025(15 of 15 days covered by obs)
NOAA Normal
1.56"
Departure from Normal
-1.42" : 9% of Normal
Year-To-Date: 20.62"
Jan 1 to Sep 15, 2025(258 of 258 days covered by obs)
NOAA Normal
28.67"
Departure from Normal
-8.05" : 72% of Normal
Water Year-To-Date: 30.83"
Oct 1, 2024 to Sep 15, 2025(350 of 350 days covered by obs)
NOAA Normal
37.01"
Departure from Normal
-6.18" : 83% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.15
2.15
0.00
Feb
2.00
1.92
0.08
Mar
2.75
2.69
0.06
Apr
4.18
4.03
0.15
May
4.49
4.59
-0.10
Jun
4.38
4.40
-0.02
Jul
3.75
3.53
0.22
Aug
3.41
3.08
0.33
Sep
3.12
3.12
0.00
Oct
3.15
3.10
0.05
Nov
3.04
2.96
0.08
Dec
2.15
2.17
-0.02
38.57
37.74
0.83