O'Fallon Weather

Weather conditions, forecast and satellite maps for O'Fallon, MO.
...The flood warning continues for the following river in Missouri and Illinois... Mississippi River at Canton Lock and Dam 20 Quincy Quincy Lock and Dam 21... (More Info)

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Current Conditions

(updated 58 min ago)

76°

92°F | 71°F

Partly Sunny

  • Feels like: 80°F
  • Humidity:85%
  • Wind: 2 mph
  • Pressure: 29.95 in/Hg
  • Visibility: 10 mi
  • Wind Chill: 76°F

Extended Forecast

  • Thu

    94°F | 74°F Mostly Sunny

  • Fri

    83°F | 56°F Sporadic Clouds

  • Sat

    75°F | 57°F Mostly Cloudy

  • Sun

    78°F | 59°F Sporadic Clouds

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