Viewing Station: MO-SS-47 : O'Fallon 2.1 SSE
Mar 13, 2021 - May 16, 20261,892 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.11"
May 1-16, 2026(16 of 16 days covered by obs)
NOAA Normal
2.56"
Departure from Normal
-1.45" : 43% of Normal
Year-To-Date: 15.03"
Jan 1 to May 16, 2026(136 of 136 days covered by obs)
NOAA Normal
15.48"
Departure from Normal
-0.45" : 97% of Normal
Water Year-To-Date: 20.94"
Oct 1, 2025 to May 16, 2026(228 of 228 days covered by obs)
NOAA Normal
24.62"
Departure from Normal
-3.68" : 85% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.48
2.56
-0.08
Feb
2.22
2.37
-0.15
Mar
3.52
3.51
0.01
Apr
4.70
4.73
-0.03
May
4.96
5.05
-0.09
Jun
4.43
4.48
-0.05
Jul
3.70
3.88
-0.18
Aug
3.63
3.54
0.09
Sep
3.31
3.25
0.06
Oct
3.16
3.25
-0.09
Nov
3.41
3.47
-0.06
Dec
2.57
2.72
-0.15
42.09
42.81
-0.72