Viewing Station: IL-SC-47 : O'Fallon 1.8 N
Mar 26, 2025 - Sep 26, 2026547 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.45"
September 1-26, 2026(25 of 26 days covered by obs)
NOAA Normal
2.89"
Departure from Normal
-1.44" : 50% of Normal
Year-To-Date: 30.21"
Jan 1 to Sep 26, 2026(268 of 269 days covered by obs)
NOAA Normal
32.60"
Departure from Normal
-2.39" : 93% of Normal
Water Year-To-Date: 37.66"
Oct 1, 2025 to Sep 26, 2026(360 of 361 days covered by obs)
NOAA Normal
41.87"
Departure from Normal
-4.21" : 90% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.58
2.78
-0.20
Feb
2.21
2.37
-0.16
Mar
3.45
3.50
-0.05
Apr
4.85
4.87
-0.02
May
4.97
5.06
-0.09
Jun
4.37
4.65
-0.28
Jul
3.96
4.23
-0.27
Aug
3.32
3.64
-0.32
Sep
3.33
3.31
0.02
Oct
3.17
3.14
0.03
Nov
3.46
3.64
-0.18
Dec
2.64
2.70
-0.06
42.31
43.89
-1.58