Viewing Station: IL-SG-45 : Chatham 1.5 E
May 30, 2014 - Dec 22, 20254,123 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.68"
December 1-22, 2025(20 of 22 days covered by obs)
NOAA Normal
1.53"
Departure from Normal
-0.85" : 45% of Normal
Year-To-Date: 25.58"
Jan 1 to Dec 22, 2025(354 of 356 days covered by obs)
NOAA Normal
37.95"
Departure from Normal
-12.37" : 67% of Normal
Water Year-To-Date: 4.37"
Oct 1, 2025 to Dec 22, 2025(81 of 83 days covered by obs)
NOAA Normal
7.72"
Departure from Normal
-3.35" : 57% 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