Hourly Weather Forecast - O'Fallon, MO

40% Chance of Light Rain

50% Chance Rain Showers

30% Chance of Light Rain

30% Chance Rain Showers

30% Chance Rain Showers

30% Chance of Light Rain

Mostly Cloudy

Mostly Cloudy

Mostly Cloudy

30% Chance of Light Rain

30% Chance of Light Rain

30% Chance Rain Showers

30% Chance Rain Showers

40% Chance of Rain

30% Chance Rain Showers

30% Chance Rain Showers

30% Chance Rain Showers

30% Chance Rain Showers

30% Chance Rain Showers

Mostly Cloudy