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O'Fallon, MO

80°F
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O'Fallon

Missouri

80°
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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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6 PM

78°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 3%
Chevron down
Partly sunny

RealFeel Shade™75°

WindWSW 9 mph

Air QualityPoor

Max UV Index1.9 (Low)

Wind Gusts21 mph

Humidity40%

Indoor Humidity40% (Ideal Humidity)

Dew Point51° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling29900 ft

7 PM

75°
RealFeel® 74°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 6%
Chevron down
Partly sunny

RealFeel Shade™74°

WindWSW 8 mph

Air QualityPoor

Max UV Index0.9 (Low)

Wind Gusts16 mph

Humidity45%

Indoor Humidity45% (Ideal Humidity)

Dew Point53° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling29900 ft

8 PM

73°
RealFeel® 70°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 12%
Chevron down
Mostly cloudy

RealFeel Shade™70°

WindWSW 8 mph

Air QualityFair

Max UV Index0.0 (Low)

Wind Gusts14 mph

Humidity47%

Indoor Humidity47% (Ideal Humidity)

Dew Point52° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover82%

Visibility10 mi

Cloud Ceiling24900 ft

9 PM

70°
RealFeel® 67°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 12%
Chevron down
Cloudy

WindWSW 7 mph

Air QualityFair

Wind Gusts12 mph

Humidity53%

Indoor Humidity53% (Ideal Humidity)

Dew Point52° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover92%

Visibility10 mi

Cloud Ceiling19800 ft

10 PM

67°
RealFeel® 65°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 16%
Chevron down
Cloudy

WindWSW 7 mph

Air QualityFair

Wind Gusts8 mph

Humidity59%

Indoor Humidity57% (Ideal Humidity)

Dew Point52° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling14700 ft

11 PM

65°
RealFeel® 60°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 51%
Chevron down
Mostly cloudy w/ t-storms

WindWSW 8 mph

Air QualityFair

Wind Gusts9 mph

Humidity69%

Indoor Humidity62% (Ideal Humidity)

Dew Point54° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover72%

Rain0.05 in

Visibility6 mi

Cloud Ceiling4000 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 78° with a RealFeel® of 77°, partly sunny with a 3% 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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