Viewing Station: MO-SS-42 : O'Fallon 2.6 NNE
Mar 14, 2020 - May 16, 20261,563 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 1.39"
May 1-16, 2026(12 of 16 days covered by obs)
NOAA Normal
2.55"
Departure from Normal
-1.16" : 54% of Normal
Year-To-Date: 14.13"
Jan 1 to May 16, 2026(90 of 136 days covered by obs)
NOAA Normal
15.32"
Departure from Normal
-1.19" : 92% of Normal
Water Year-To-Date: 17.32"
Oct 1, 2025 to May 16, 2026(152 of 228 days covered by obs)
NOAA Normal
24.37"
Departure from Normal
-7.05" : 71% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.45
2.48
-0.03
Feb
2.19
2.27
-0.08
Mar
3.47
3.37
0.10
Apr
4.66
4.60
0.06
May
4.95
5.03
-0.08
Jun
4.45
4.44
0.01
Jul
3.73
3.90
-0.17
Aug
3.63
3.52
0.11
Sep
3.31
3.24
0.07
Oct
3.13
3.22
-0.09
Nov
3.37
3.41
-0.04
Dec
2.55
2.63
-0.08
41.89
42.11
-0.22