Viewing Station: IL-HY-27 : Colona 1.3 WNW
May 1, 2023 - May 27, 20261,110 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.92"
May 1-27, 2026(27 of 27 days covered by obs)
NOAA Normal
4.04"
Departure from Normal
-2.12" : 48% of Normal
Year-To-Date: 11.77"
Jan 1 to May 27, 2026(147 of 147 days covered by obs)
NOAA Normal
13.35"
Departure from Normal
-1.58" : 88% of Normal
Water Year-To-Date: 17.01"
Oct 1, 2025 to May 27, 2026(239 of 239 days covered by obs)
NOAA Normal
20.34"
Departure from Normal
-3.33" : 84% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
1.49
1.52
-0.03
Feb
1.68
1.74
-0.06
Mar
2.44
2.45
-0.01
Apr
3.70
3.63
0.07
May
4.64
4.78
-0.14
Jun
4.76
4.64
0.12
Jul
4.01
4.17
-0.16
Aug
3.87
3.86
0.01
Sep
3.42
3.45
-0.03
Oct
2.78
2.78
0.00
Nov
2.30
2.26
0.04
Dec
1.91
1.99
-0.08
37.00
37.27
-0.27