O'Fallon, Missouri | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Partly Cloudy
    48°
    Thursday 3/28
    Forecast night icon
    48°
    Partly Cloudy
    Hourly
    Night Details
    Clear late this evening then becoming partly cloudy. Not as cool with lows in the mid 40s. Southwest winds 5 to 10 mph.
  • Forecast day icon
    Friday
    Mostly Sunny
    73°
    Forecast night icon
    Night
    40% Chance Rain Showers
    60°
    Friday 3/29
    Day
    73°
    Mostly Sunny
    Forecast day icon
    Night
    60°
    40% Chance Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Not as cool with highs in the mid 70s. South winds 15 to 20 mph with gusts up to 30 mph.
    Night Details
    Partly cloudy in the evening then becoming mostly cloudy. A 40 percent chance of showers. Not as cool with lows in the upper 50s. South winds 15 to 20 mph with gusts up to 30 mph.
  • Forecast day icon
    Saturday
    Partly Sunny
    69°
    Forecast night icon
    Night
    50% Chance of Storms
    53°
    Saturday 3/30
    Day
    69°
    Partly Sunny
    Forecast day icon
    Night
    53°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A slight chance of rain in the afternoon. Highs in the mid 70s. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.
    Night Details
    Mostly cloudy with a chance of rain with a slight chance of thunderstorms. Lows in the mid 50s. Northwest winds 5 to 10 mph becoming east after midnight. Chance of rain 50 percent.
  • Forecast day icon
    Sunday
    50% Chance of Storms
    73°
    Forecast night icon
    Night
    50% Chance of Storms
    62°
    Sunday 3/31
    Day
    73°
    50% Chance of Storms
    Forecast day icon
    Night
    62°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. A chance of rain and thunderstorms. Highs in the upper 70s. Lows in the lower 60s. Chance of rain 50 percent.
    Night Details
    Mostly cloudy. A chance of rain and thunderstorms. Highs in the upper 70s. Lows in the lower 60s. Chance of rain 50 percent.
  • Forecast day icon
    Monday
    70% Chance of Storms
    73°
    Forecast night icon
    Night
    70% Chance of Storms
    51°
    Monday 4/1
    Day
    73°
    70% Chance of Storms
    Forecast day icon
    Night
    51°
    70% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Rain likely with a chance of thunderstorms. Highs in the mid 70s. Lows in the lower 50s. Chance of rain 70 percent.
    Night Details
    Rain likely with a chance of thunderstorms. Highs in the mid 70s. Lows in the lower 50s. Chance of rain 70 percent.
  • Forecast day icon
    Tuesday
    Partly Sunny
    52°
    Forecast night icon
    Night
    Partly Cloudy
    40°
    Tuesday 4/2
    Day
    52°
    Partly Sunny
    Forecast day icon
    Night
    40°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A slight chance of rain and thunderstorms in the morning. Cooler with highs in the lower 60s. Chance of rain 20 percent.
    Night Details
    Partly cloudy in the evening then clearing. Cooler with lows in the upper 30s.
  • Forecast day icon
    Wednesday
    Mostly Sunny
    54°
    Forecast night icon
    Night
    Mostly Clear
    39°
    Wednesday 4/3
    Day
    54°
    Mostly Sunny
    Forecast day icon
    Night
    39°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Highs in the upper 50s. Lows in the upper 30s.
    Night Details
    Mostly clear. Highs in the upper 50s. Lows in the upper 30s.
  • Forecast day icon
    Thursday
    Sunny
    68°
    Forecast night icon
    Night
    Clear
    48°
    Thursday 4/4
    Day
    68°
    Sunny
    Forecast day icon
    Night
    48°
    Clear
    Forecast night icon
    Day Details
    Sunny. Highs in the upper 60s.
    Night Details
    Clear. Low temperature around 48F. Dew point will be around 41F with an average humidity of 64%. Winds will be 5 mph from the S.
  • Forecast day icon
    Friday
    Sunny
    71°
    Forecast night icon
    Night
    Clear
    50°
    Friday 4/5
    Day
    71°
    Sunny
    Forecast day icon
    Night
    50°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 71F. Dew point will be around 47F with an average humidity of 58%. Winds will be 6 mph from the S.
    Night Details
    Clear. Low temperature around 50F. Dew point will be around 44F with an average humidity of 63%. Winds will be 6 mph from the S.
  • Forecast day icon
    Saturday
    Mostly Sunny
    70°
    Forecast night icon
    Night
    Mostly Clear
    50°
    Saturday 4/6
    Day
    70°
    Mostly Sunny
    Forecast day icon
    Night
    50°
    Mostly Clear
    Forecast night icon
    Day Details
    Mostly sunny. High temperature around 70F. Dew point will be around 48F with an average humidity of 60%. Winds will be 6 mph from the S.
    Night Details
    Mostly clear. Low temperature around 50F. Dew point will be around 47F with an average humidity of 69%. Winds will be 5 mph from the S.