O'Fallon, Missouri | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Thursday
    Sunny
    63°
    Forecast night icon
    Night
    Partly Cloudy
    45°
    Thursday 3/28
    Day
    63°
    Sunny
    Forecast day icon
    Night
    45°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Sunny and not as cool. Near steady temperature in the mid 60s. Southwest winds around 10 mph with gusts up to 20 mph.
    Night Details
    Mostly clear in the 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
    71°
    Forecast night icon
    Night
    40% Chance Rain Showers
    59°
    Friday 3/29
    Day
    71°
    Mostly Sunny
    Forecast day icon
    Night
    59°
    40% Chance Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the lower 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
    72°
    Forecast night icon
    Night
    50% Chance of Storms
    55°
    Saturday 3/30
    Day
    72°
    Partly Sunny
    Forecast day icon
    Night
    55°
    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. Chance of rain 50 percent.
  • Forecast day icon
    Sunday
    50% Chance of Storms
    73°
    Forecast night icon
    Night
    50% Chance of Storms
    60°
    Sunday 3/31
    Day
    73°
    50% Chance of Storms
    Forecast day icon
    Night
    60°
    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
    74°
    Forecast night icon
    Night
    70% Chance of Storms
    51°
    Monday 4/1
    Day
    74°
    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
    57°
    Forecast night icon
    Night
    Partly Cloudy
    42°
    Tuesday 4/2
    Day
    57°
    Partly Sunny
    Forecast day icon
    Night
    42°
    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
    Sunny
    57°
    Forecast night icon
    Night
    Clear
    40°
    Wednesday 4/3
    Day
    57°
    Sunny
    Forecast day icon
    Night
    40°
    Clear
    Forecast night icon
    Day Details
    Sunny. Highs in the upper 50s.
    Night Details
    Clear. Low temperature around 40F. Dew point will be around 34F with an average humidity of 65%. Winds will be 8 mph from the W.
  • Forecast day icon
    Thursday
    Sunny
    68°
    Forecast night icon
    Night
    Clear
    46°
    Thursday 4/4
    Day
    68°
    Sunny
    Forecast day icon
    Night
    46°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 68F. Dew point will be around 39F with an average humidity of 53%. Winds will be 6 mph from the SW.
    Night Details
    Clear. Low temperature around 46F. Dew point will be around 40F with an average humidity of 62%. Winds will be 4 mph from the S.
  • Forecast day icon
    Friday
    Sunny
    69°
    Forecast night icon
    Night
    Mostly Clear
    51°
    Friday 4/5
    Day
    69°
    Sunny
    Forecast day icon
    Night
    51°
    Mostly Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 69F. Dew point will be around 44F with an average humidity of 56%. Winds will be 7 mph from the S.
    Night Details
    Mostly clear. Low temperature around 51F. Dew point will be around 45F with an average humidity of 66%. Winds will be 6 mph from the S.
  • Forecast day icon
    Saturday
    30% Chance of Rain
    70°
    Forecast night icon
    Night
    30% Chance of Rain
    49°
    Saturday 4/6
    Day
    70°
    30% Chance of Rain
    Forecast day icon
    Night
    49°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Mostly sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 70F. Dew point will be around 49F with an average humidity of 62%. Winds will be 9 mph from the S.
    Night Details
    Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 49F. Dew point will be around 46F with an average humidity of 70%. Winds will be 3 mph from the S.