Viewing Station: IL-JF-10 : Mount Vernon 5.2 SSW
Nov 1, 2018 - May 27, 20262,604 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 2.82"
May 1-27, 2026(27 of 27 days covered by obs)
NOAA Normal
4.47"
Departure from Normal
-1.65" : 63% of Normal
Year-To-Date: 16.58"
Jan 1 to May 27, 2026(147 of 147 days covered by obs)
NOAA Normal
18.95"
Departure from Normal
-2.37" : 88% of Normal
Water Year-To-Date: 23.82"
Oct 1, 2025 to May 27, 2026(239 of 239 days covered by obs)
NOAA Normal
29.35"
Departure from Normal
-5.53" : 81% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
3.06
2.95
0.11
Feb
2.62
2.64
-0.02
Mar
3.94
3.81
0.13
Apr
4.86
4.94
-0.08
May
5.13
4.96
0.17
Jun
4.63
4.59
0.04
Jul
3.99
3.90
0.09
Aug
3.40
3.23
0.17
Sep
3.18
3.19
-0.01
Oct
3.41
3.33
0.08
Nov
3.98
3.91
0.07
Dec
3.01
3.01
0.00
45.21
44.46
0.75