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Weather for O'Fallon, MOO'Fallon, MO Weather & Current Conditions

63366 Weather (O'Fallon, MO)

O'Fallon, MO WeatherCurrent Conditions and Weather for O'Fallon, Missouri
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Clear at O'Fallon (63366), temperature is 65°F18°C, dew point 52°F11°C, humidity 62%. Wind direction is SE at 8 mphat 13 km/h with visibility of 10 mi16 km. Barometric pressure is 30.24 in1024 mb. Last update: 11:41 pm.*
*Time is approximately 11:41 pm Fri, Oct 30, 2026. Time will be within 15 minutes of current local time. O'Fallon weather forecast data is updated every 15 minutes.

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I call this season fake weather. The sun is shining but it cold like the north pole outside. ―Sage Canny
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O'Fallon MO Weather - 12:41 am

O'Fallon Weather Forecast

Weather forecast for: 2 Miles NNE Saint Louis MO
Last Update: 8:26 pm CDT Oct 30, 2026
Tonight: Mostly cloudy, with a low around 60. East wind 3 to 6 mph.
Saturday: A chance of sprinkles after 11am. Cloudy, with a high near 73. East wind 3 to 6 mph.
Saturday Night: A chance of sprinkles between 10pm and 1am, then a chance of showers after 1am. Mostly cloudy, with a low around 60. East wind around 6 mph. Chance of precipitation is 30%.
Sunday: Showers likely, mainly between 7am and 1pm. Mostly cloudy, with a high near 67. Southeast wind 5 to 7 mph. Chance of precipitation is 70%.
Sunday Night: Cloudy, with a low around 57. Southeast wind around 7 mph.
Monday: A 40 percent chance of showers. Cloudy, with a high near 69.
Monday Night: A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 62.
Tuesday: Showers. High near 72. Chance of precipitation is 80%.
Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.
Wednesday: A 50 percent chance of showers. Mostly cloudy, with a high near 68.
Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 53.
Thursday: A 20 percent chance of showers. Partly sunny, with a high near 65.
Thursday Night: Partly cloudy, with a low around 49.
Friday: Mostly sunny, with a high near 64.

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