Forecast
O'Fallon, MO
Rain forecast tomorrow

Rain forecast tomorrow in O'Fallon, MO

Updated September 25 · Live conditions refresh automatically.

Umbrella

No need

No need for an umbrella during the day.

Tomorrow24 hours

MustNeedLikely neededLikely no needNo need

No need

Hourly rain conditions

Loading hourly rain details… Chance is shown in percent; rain amount in inches; wind in mph; humidity and cloud cover in percentages.

Peak 2%Total 0 in

Precip (%)

Rain (in)

Hour	Chance	Clouds	Wind	Temp	Feels	Humidity
Partly cloudy	0%	50%	1 mph G3	62°	64°	90%
Partly cloudy	0%	55%	1 mph G3	61°	63°	93%
Mostly cloudy	0%	62%	0 mph G2	61°	64°	97%
Mostly cloudy	0%	67%	1 mph G3	61°	64°	93%
Mostly cloudy	0%	72%	1 mph G4	61°	64°	97%
Mostly cloudy	0%	77%	1 mph G4	61°	64°	93%
Mostly cloudy	0%	81%	1 mph G4	61°	64°	93%
Mostly cloudy	0%	85%	1 mph G4	61°	64°	97%
Cloudy	0%	88%	2 mph G5	62°	67°	96%
Cloudy	0%	92%	2 mph G6	63°	71°	97%
Cloudy	0%	91%	3 mph G7	66°	74°	90%
Cloudy	0%	91%	4 mph G7	67°	74°	87%
Cloudy	0%	92%	4 mph G8	69°	76°	81%
Cloudy	0%	91%	3 mph G7	70°	77°	76%
Cloudy	0%	91%	4 mph G8	70°	77°	76%
Cloudy	0%	89%	4 mph G8	71°	78°	73%
Cloudy	0%	89%	4 mph G9	71°	77°	73%
Cloudy	1%	88%	4 mph G8	70°	76°	76%
Mostly cloudy	2%	85%	4 mph G9	70°	73°	76%
Mostly cloudy	0%	80%	3 mph G8	69°	70°	75%
Mostly cloudy	0%	79%	3 mph G7	68°	69°	78%
Mostly cloudy	0%	82%	4 mph G8	69°	70°	81%
Mostly cloudy	0%	79%	4 mph G8	75°	75°	83%
Mostly cloudy	0%	82%	4 mph G8	65°	65°	85%

Partly cloudy

Chance 0%Clouds 50%

Rain0 in

Wind1 mph G3

Temp62°

Feels64°

Humidity90%

Partly cloudy

Chance 0%Clouds 55%

Rain0 in

Wind1 mph G3

Temp61°

Feels63°

Humidity93%

Mostly cloudy

Chance 0%Clouds 62%

Rain0 in

Wind0 mph G2

Temp61°

Feels64°

Humidity97%

Mostly cloudy

Chance 0%Clouds 67%

Rain0 in

Wind1 mph G3

Temp61°

Feels64°

Humidity93%

Mostly cloudy

Chance 0%Clouds 72%

Rain0 in

Wind1 mph G4

Temp61°

Feels64°

Humidity97%

Mostly cloudy

Chance 0%Clouds 77%

Rain0 in

Wind1 mph G4

Temp61°

Feels64°

Humidity93%

Mostly cloudy

Chance 0%Clouds 81%

Rain0 in

Wind1 mph G4

Temp61°

Feels64°

Humidity93%

Mostly cloudy

Chance 0%Clouds 85%

Rain0 in

Wind1 mph G4

Temp61°

Feels64°

Humidity97%

Cloudy

Chance 0%Clouds 88%

Rain0 in

Wind2 mph G5

Temp62°

Feels67°

Humidity96%

Cloudy

Chance 0%Clouds 92%

Rain0 in

Wind2 mph G6

Temp63°

Feels71°

Humidity97%

Cloudy

Chance 0%Clouds 91%

Rain0 in

Wind3 mph G7

Temp66°

Feels74°

Humidity90%

Cloudy

Chance 0%Clouds 91%

Rain0 in

Wind4 mph G7

Temp67°

Feels74°

Humidity87%

Cloudy

Chance 0%Clouds 92%

Rain0 in

Wind4 mph G8

Temp69°

Feels76°

Humidity81%

Cloudy

Chance 0%Clouds 91%

Rain0 in

Wind3 mph G7

Temp70°

Feels77°

Humidity76%

Cloudy

Chance 0%Clouds 91%

Rain0 in

Wind4 mph G8

Temp70°

Feels77°

Humidity76%

Cloudy

Chance 0%Clouds 89%

Rain0 in

Wind4 mph G8

Temp71°

Feels78°

Humidity73%

Cloudy

Chance 0%Clouds 89%

Rain0 in

Wind4 mph G9

Temp71°

Feels77°

Humidity73%

Cloudy

Chance 1%Clouds 88%

Rain0 in

Wind4 mph G8

Temp70°

Feels76°

Humidity76%

Mostly cloudy

Chance 2%Clouds 85%

Rain0 in

Wind4 mph G9

Temp70°

Feels73°

Humidity76%

Mostly cloudy

Chance 0%Clouds 80%

Rain0 in

Wind3 mph G8

Temp69°

Feels70°

Humidity75%

Mostly cloudy

Chance 0%Clouds 79%

Rain0 in

Wind3 mph G7

Temp68°

Feels69°

Humidity78%

Mostly cloudy

Chance 0%Clouds 82%

Rain0 in

Wind4 mph G8

Temp69°

Feels70°

Humidity81%

Mostly cloudy

Chance 0%Clouds 79%

Rain0 in

Wind4 mph G8

Temp75°

Feels75°

Humidity83%

Mostly cloudy

Chance 0%Clouds 82%

Rain0 in

Wind4 mph G8

Temp65°

Feels65°

Humidity85%

Quick answer — O'Fallon, MO

No need — O'Fallon, MO

Rain forecast tomorrow in O'Fallon, MO: No need. No need for an umbrella during the day.

Verdict: No need
High / Low: 71° / 61°
Details: No need for an umbrella during the day.

Updated 9/25/2026 · Live conditions refresh automatically.