Viewing Station: IL-SG-45 : Chatham 1.5 E
May 30, 2014 - May 27, 20264,277 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.63"
May 1-27, 2026(27 of 27 days covered by obs)
NOAA Normal
3.91"
Departure from Normal
-1.28" : 67% of Normal
Year-To-Date: 15.75"
Jan 1 to May 27, 2026(147 of 147 days covered by obs)
NOAA Normal
14.99"
Departure from Normal
0.76" : 105% of Normal
Water Year-To-Date: 20.67"
Oct 1, 2025 to May 27, 2026(239 of 239 days covered by obs)
NOAA Normal
23.33"
Departure from Normal
-2.66" : 89% 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