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Severe weather outbreak, strong tornadoes expected through Monday. Get the details. Chevron right
Following a nice start to the week, the Northeast will turn wet and chilly again. Get the forecast. Chevron right

O'Fallon, MO

61°F
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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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4 AM

62°
RealFeel® 56°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 69%
Chevron down
Thunderstorms

WindSE 9 mph

Air QualityFair

Wind Gusts14 mph

Humidity85%

Indoor Humidity69% (Slightly Humid)

Dew Point57° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover99%

Rain0.05 in

Visibility10 mi

Cloud Ceiling30000 ft

5 AM

62°
RealFeel® 55°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 66%
Chevron down
Thunderstorms

WindSE 10 mph

Air QualityFair

Wind Gusts14 mph

Humidity87%

Indoor Humidity70% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover100%

Rain0.02 in

Visibility6 mi

Cloud Ceiling30000 ft

6 AM

61°
RealFeel® 57°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 49%
Chevron down
Cloudy

WindSE 12 mph

Air QualityFair

Wind Gusts15 mph

Humidity89%

Indoor Humidity71% (Slightly Humid)

Dew Point58° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling30000 ft

7 AM

61°
RealFeel® 57°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 44%
Chevron down
Cloudy

RealFeel Shade™57°

WindSE 13 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts15 mph

Humidity92%

Indoor Humidity72% (Slightly Humid)

Dew Point59° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover99%

Visibility10 mi

Cloud Ceiling30000 ft

8 AM

64°
RealFeel® 59°
Cool
RealFeel Guide
Cool
53° to 62°
Light jacket or sweater may be appropriate.
LEARN MORE
rain drop 34%
Chevron down
Cloudy

RealFeel Shade™59°

WindSE 18 mph

Air QualityFair

Max UV Index0.6 (Low)

Wind Gusts24 mph

Humidity86%

Indoor Humidity74% (Slightly Humid)

Dew Point60° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling4900 ft

9 AM

66°
RealFeel® 63°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 34%
Chevron down
Cloudy

RealFeel Shade™63°

WindSE 20 mph

Air QualityFair

Max UV Index0.9 (Low)

Wind Gusts25 mph

Humidity84%

Indoor Humidity79% (Slightly Humid)

Dew Point61° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling3300 ft

10 AM

69°
RealFeel® 66°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 37%
Chevron down
Cloudy

RealFeel Shade™65°

WindSE 20 mph

Air QualityFair

Max UV Index1.2 (Low)

Wind Gusts28 mph

Humidity80%

Indoor Humidity80% (Slightly Humid)

Dew Point62° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling1600 ft

11 AM

70°
RealFeel® 68°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 47%
Chevron down
Cloudy

RealFeel Shade™66°

WindSSE 20 mph

Air QualityFair

Max UV Index1.7 (Low)

Wind Gusts31 mph

Humidity78%

Indoor Humidity78% (Humid)

Dew Point63° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling1300 ft

12 PM

72°
RealFeel® 66°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 51%
Chevron down
Thunderstorms

RealFeel Shade™64°

WindSSE 20 mph

Air QualityFair

Max UV Index1.9 (Low)

Wind Gusts35 mph

Humidity76%

Indoor Humidity76% (Humid)

Dew Point64° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Rain0.11 in

Visibility4 mi

Cloud Ceiling1000 ft

1 PM

74°
RealFeel® 73°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 47%
Chevron down
Cloudy

RealFeel Shade™70°

WindSSE 20 mph

Air QualityPoor

Max UV Index2.5 (Moderate)

Wind Gusts31 mph

Humidity75%

Indoor Humidity75% (Humid)

Dew Point65° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling700 ft

2 PM

76°
RealFeel® 75°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy

RealFeel Shade™73°

WindSSE 20 mph

Air QualityPoor

Max UV Index2.3 (Low)

Wind Gusts23 mph

Humidity72%

Indoor Humidity72% (Humid)

Dew Point66° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling1100 ft

3 PM

74°
RealFeel® 70°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 69%
Chevron down
Thunderstorms

RealFeel Shade™69°

WindSSE 20 mph

Air QualityPoor

Max UV Index1.2 (Low)

Wind Gusts23 mph

Humidity88%

Indoor Humidity88% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Rain0.44 in

Visibility2 mi

Cloud Ceiling1600 ft

4 PM

78°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy

RealFeel Shade™77°

WindS 20 mph

Air QualityPoor

Max UV Index1.3 (Low)

Wind Gusts23 mph

Humidity77%

Indoor Humidity77% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling2000 ft

5 PM

79°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 60%
Chevron down
Thunderstorms

RealFeel Shade™76°

WindS 20 mph

Air QualityPoor

Max UV Index0.6 (Low)

Wind Gusts24 mph

Humidity80%

Indoor Humidity80% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Rain0.44 in

Visibility2 mi

Cloud Ceiling2000 ft

6 PM

76°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Mostly cloudy

RealFeel Shade™76°

WindSSW 21 mph

Air QualityFair

Max UV Index1.0 (Low)

Wind Gusts24 mph

Humidity78%

Indoor Humidity78% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™4 (Dull)

Cloud Cover83%

Visibility10 mi

Cloud Ceiling20700 ft

7 PM

76°
RealFeel® 74°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Mostly cloudy

RealFeel Shade™74°

WindSSW 21 mph

Air QualityFair

Max UV Index0.6 (Low)

Wind Gusts24 mph

Humidity73%

Indoor Humidity73% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover75%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

73°
RealFeel® 66°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 51%
Chevron down
Mostly cloudy w/ t-storms

WindSW 16 mph

Air QualityFair

Wind Gusts20 mph

Humidity82%

Indoor Humidity82% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover69%

Rain0.20 in

Visibility3 mi

Cloud Ceiling2000 ft

9 PM

70°
RealFeel® 68°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 47%
Chevron down
Intermittent clouds

WindWSW 14 mph

Air QualityFair

Wind Gusts17 mph

Humidity85%

Indoor Humidity85% (Humid)

Dew Point66° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover66%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

69°
RealFeel® 66°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 40%
Chevron down
Intermittent clouds

WindW 13 mph

Air QualityFair

Wind Gusts15 mph

Humidity84%

Indoor Humidity84% (Humid)

Dew Point64° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover65%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

67°
RealFeel® 64°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 34%
Chevron down
Intermittent clouds

WindW 13 mph

Air QualityFair

Wind Gusts15 mph

Humidity81%

Indoor Humidity79% (Slightly Humid)

Dew Point61° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover65%

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 62° with a RealFeel® of 56°, thunderstorms with a 69% 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
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