Weather Alert
O'Fallon Weather Warning NWS WEATHER ALERT FOR THE O FALLON, MO AREA - HARD FREEZE WARNING Issued: 159 AM CST Fri Nov 6 2026 O'Fallon Weather Warning

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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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Overcast at O'Fallon (63366), temperature is 52°F11°C, dew point 47°F8°C, humidity 82%. Wind direction is N at 10 mphat 16 km/h with visibility of 10 mi16 km. Barometric pressure is 30.08 in1019 mb. Last update: 3:58 am.*
*Time is approximately 3:58 am Fri, Nov 06, 2026. Time will be within 15 minutes of current local time. O'Fallon weather forecast data is updated every 15 minutes.
O'Fallon MO Weather - 4:58 am

O'Fallon Weather Forecast

Weather forecast for: 2 Miles NNE Saint Louis MO
Last Update: 3:56 am CST Nov 6, 2026
Overnight: Patchy drizzle. Cloudy, with a low around 48. North wind 3 to 7 mph.
Friday: Cloudy through mid morning, then gradual clearing, with a high near 52. North wind 6 to 9 mph.
Friday Night: Clear, with a low around 34. North wind around 5 mph becoming calm in the evening.
Saturday: Sunny, with a high near 54. Light northwest wind.
Saturday Night: Clear, with a low around 35. Light and variable wind.
Sunday: Sunny, with a high near 63.
Sunday Night: Clear, with a low around 43.
Monday: Sunny, with a high near 67.
Monday Night: Clear, with a low around 45.
Tuesday: Sunny, with a high near 67.
Tuesday Night: Mostly clear, with a low around 45.
Veterans Day: Sunny, with a high near 66.
Wednesday Night: A 20 percent chance of rain. Partly cloudy, with a low around 46.
Thursday: Mostly sunny, with a high near 61.

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