Viewing Station: IL-SC-47 : O'Fallon 1.8 N
Mar 26, 2025 - Sep 15, 2025172 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.32"
September 1-15, 2025(15 of 15 days covered by obs)
NOAA Normal
1.67"
Departure from Normal
-1.34" : 19% of Normal
Year-To-Date: 25.37"
Jan 1 to Sep 15, 2025(169 of 258 days covered by obs)
NOAA Normal
31.38"
Departure from Normal
-6.01" : 81% of Normal
Water Year-To-Date: 25.37"
Oct 1, 2024 to Sep 15, 2025(169 of 350 days covered by obs)
NOAA Normal
40.64"
Departure from Normal
-15.27" : 62% 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