Viewing Station: IL-MD-12 : Granite City 2.3 NE
May 8, 2007 - May 27, 20264,616 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 4.83"
May 1-27, 2026(27 of 27 days covered by obs)
NOAA Normal
4.28"
Departure from Normal
0.55" : 113% of Normal
Year-To-Date: 18.15"
Jan 1 to May 27, 2026(147 of 147 days covered by obs)
NOAA Normal
16.87"
Departure from Normal
1.28" : 108% of Normal
Water Year-To-Date: 25.20"
Oct 1, 2025 to May 27, 2026(238 of 239 days covered by obs)
NOAA Normal
25.96"
Departure from Normal
-0.76" : 97% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.48
2.64
-0.16
Feb
2.14
2.29
-0.15
Mar
3.35
3.39
-0.04
Apr
4.62
4.71
-0.09
May
4.91
5.10
-0.19
Jun
4.24
4.41
-0.17
Jul
4.01
4.13
-0.12
Aug
3.28
3.68
-0.40
Sep
3.29
3.27
0.02
Oct
3.13
3.22
-0.09
Nov
3.36
3.52
-0.16
Dec
2.60
2.63
-0.03
41.41
42.99
-1.58