Viewing Station: IL-WS-1 : Ashley 1.4 NNE
Aug 17, 2010 - May 27, 20264,998 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.78"
May 1-27, 2026(27 of 27 days covered by obs)
NOAA Normal
4.46"
Departure from Normal
0.32" : 107% of Normal
Year-To-Date: 18.76"
Jan 1 to May 27, 2026(144 of 147 days covered by obs)
NOAA Normal
18.53"
Departure from Normal
0.23" : 101% of Normal
Water Year-To-Date: 27.77"
Oct 1, 2025 to May 27, 2026(236 of 239 days covered by obs)
NOAA Normal
28.76"
Departure from Normal
-0.99" : 97% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.94
2.83
0.11
Feb
2.47
2.47
0.00
Mar
3.80
3.61
0.19
Apr
4.86
4.80
0.06
May
5.12
5.00
0.12
Jun
4.67
4.74
-0.07
Jul
3.91
3.93
-0.02
Aug
3.36
3.16
0.20
Sep
3.35
3.35
0.00
Oct
3.33
3.27
0.06
Nov
3.94
3.78
0.16
Dec
2.96
2.88
0.08
44.71
43.82
0.89