Viewing Station: IL-SC-33 : O'Fallon 2.8 NNE
Dec 6, 2020 - Dec 31, 2021219 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.00"
October 1-30, 2025(0 of 30 days covered by obs)
NOAA Normal
3.09"
Departure from Normal
-3.09" : 0% of Normal
Year-To-Date: 0.00"
Jan 1 to Oct 30, 2025(0 of 303 days covered by obs)
NOAA Normal
36.07"
Departure from Normal
-36.07" : 0% of Normal
Water Year-To-Date: 0.00"
Oct 1, 2025 to Oct 30, 2025(0 of 30 days covered by obs)
NOAA Normal
3.09"
Departure from Normal
-3.09" : 0% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.59
2.79
-0.20
Feb
2.22
2.37
-0.15
Mar
3.39
3.49
-0.10
Apr
4.82
4.88
-0.06
May
4.94
5.07
-0.13
Jun
4.35
4.66
-0.31
Jul
4.00
4.23
-0.23
Aug
3.36
3.63
-0.27
Sep
3.31
3.29
0.02
Oct
3.19
3.15
0.04
Nov
3.49
3.65
-0.16
Dec
2.65
2.69
-0.04
42.31
43.90
-1.59