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O'Fallon, MO

84°F
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O'Fallon

Missouri

84°
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O'Fallon, MO Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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7 PM

80°
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 55%
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Thunderstorms
alerts

Tornado Watch

2:15 PM Wednesday - 10:00 PM Wednesday
alerts

Wind Advisory

1:00 PM Wednesday - 8:00 PM Wednesday

RealFeel Shade™79°

Heat Index84°

WindWSW 16 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts24 mph

Humidity74%

Indoor Humidity74% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Rain0.05 in

Visibility10 mi

Cloud Ceiling9000 ft

8 PM

79°
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 58%
Chevron down
Thunderstorms
alerts

Tornado Watch

2:15 PM Wednesday - 10:00 PM Wednesday

RealFeel Shade™79°

Heat Index83°

WindWSW 13 mph

Air QualityFair

Max UV Index0.1 (Low)

Wind Gusts23 mph

Humidity82%

Indoor Humidity82% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Rain0.19 in

Visibility4 mi

Cloud Ceiling2000 ft

9 PM

77°
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy
alerts

Tornado Watch

2:15 PM Wednesday - 10:00 PM Wednesday

WindWSW 12 mph

Air QualityFair

Wind Gusts27 mph

Humidity82%

Indoor Humidity82% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling2000 ft

10 PM

75°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy

WindWSW 9 mph

Air QualityFair

Wind Gusts23 mph

Humidity87%

Indoor Humidity87% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling20800 ft

11 PM

75°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy

WindW 8 mph

Air QualityFair

Wind Gusts20 mph

Humidity85%

Indoor Humidity85% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling23900 ft

Hourly Weather Forecast for O'Fallon

AccuWeather's hourly forecast for O'Fallon provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 80° with a RealFeel® of 79°, thunderstorms with a 55% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

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Weather Near O'Fallon:

  • St. Charles, MO
  • St. Louis, MO
  • St. Peters, MO
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