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O'Fallon, MO

70°F
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O'Fallon

Missouri

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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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3 AM

70°
RealFeel® 69°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 14%
Chevron down
Partly cloudy

WindESE 6 mph

Air QualityFair

Wind Gusts7 mph

Humidity79%

Indoor Humidity79% (Humid)

Dew Point63° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

4 AM

69°
RealFeel® 68°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 18%
Chevron down
Partly cloudy

WindESE 6 mph

Air QualityFair

Wind Gusts8 mph

Humidity80%

Indoor Humidity80% (Humid)

Dew Point63° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

5 AM

69°
RealFeel® 68°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 43%
Chevron down
Partly cloudy

WindESE 7 mph

Air QualityFair

Wind Gusts8 mph

Humidity82%

Indoor Humidity82% (Humid)

Dew Point63° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

6 AM

68°
RealFeel® 67°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 47%
Chevron down
Partly sunny

RealFeel Shade™67°

WindESE 7 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts8 mph

Humidity84%

Indoor Humidity84% (Humid)

Dew Point63° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

7 AM

69°
RealFeel® 67°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 51%
Chevron down
Partly sunny w/ t-storms
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™65°

WindESE 8 mph

Air QualityFair

Max UV Index1.2 (Low)

Wind Gusts9 mph

Humidity83%

Indoor Humidity83% (Humid)

Dew Point64° F

AccuLumen Brightness Index™7 (Bright)

Cloud Cover45%

Rain0.04 in

Visibility6 mi

Cloud Ceiling30000 ft

8 AM

71°
RealFeel® 71°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 40%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™71°

WindESE 8 mph

Air QualityPoor

Max UV Index0.5 (Low)

Wind Gusts9 mph

Humidity81%

Indoor Humidity81% (Humid)

Dew Point65° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling2000 ft

9 AM

73°
RealFeel® 74°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 34%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™74°

WindSE 8 mph

Air QualityPoor

Max UV Index0.8 (Low)

Wind Gusts10 mph

Humidity80%

Indoor Humidity80% (Humid)

Dew Point66° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling2000 ft

10 AM

75°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 40%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™75°

WindSSE 8 mph

Air QualityPoor

Max UV Index1.1 (Low)

Wind Gusts12 mph

Humidity79%

Indoor Humidity79% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Visibility10 mi

Cloud Ceiling2000 ft

11 AM

76°
RealFeel® 74°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 75%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™72°

WindS 8 mph

Air QualityPoor

Max UV Index1.3 (Low)

Wind Gusts14 mph

Humidity79%

Indoor Humidity79% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Rain0.25 in

Visibility3 mi

Cloud Ceiling2000 ft

12 PM

77°
RealFeel® 82°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™79°

WindSSW 9 mph

Air QualityPoor

Max UV Index2.4 (Low)

Wind Gusts16 mph

Humidity78%

Indoor Humidity78% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Visibility10 mi

Cloud Ceiling2000 ft

1 PM

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

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™74°

WindSSW 10 mph

Air QualityPoor

Max UV Index2.0 (Low)

Wind Gusts20 mph

Humidity91%

Indoor Humidity91% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Rain0.25 in

Visibility3 mi

Cloud Ceiling4000 ft

2 PM

78°
RealFeel® 84°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 40%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™80°

WindSSW 10 mph

Air QualityPoor

Max UV Index2.7 (Moderate)

Wind Gusts21 mph

Humidity78%

Indoor Humidity78% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Visibility10 mi

Cloud Ceiling5200 ft

3 PM

79°
RealFeel® 85°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 34%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™82°

Heat Index83°

WindSW 10 mph

Air QualityPoor

Max UV Index2.1 (Low)

Wind Gusts22 mph

Humidity76%

Indoor Humidity76% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover98%

Visibility10 mi

Cloud Ceiling5500 ft

4 PM

81°
RealFeel® 86°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 39%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™84°

Heat Index86°

WindSW 9 mph

Air QualityPoor

Max UV Index1.3 (Low)

Wind Gusts23 mph

Humidity72%

Indoor Humidity72% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Visibility10 mi

Cloud Ceiling5700 ft

5 PM

80°
RealFeel® 84°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™84°

Heat Index83°

WindSW 9 mph

Air QualityPoor

Max UV Index0.9 (Low)

Wind Gusts22 mph

Humidity76%

Indoor Humidity76% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Visibility10 mi

Cloud Ceiling6100 ft

6 PM

79°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 74%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™78°

Heat Index80°

WindWSW 9 mph

Air QualityPoor

Max UV Index0.4 (Low)

Wind Gusts21 mph

Humidity78%

Indoor Humidity78% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover100%

Rain0.19 in

Visibility4 mi

Cloud Ceiling2000 ft

7 PM

78°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 74%
Chevron down
Thunderstorms
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™77°

WindWSW 8 mph

Air QualityPoor

Max UV Index0.2 (Low)

Wind Gusts18 mph

Humidity81%

Indoor Humidity81% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™1 (Dark)

Cloud Cover99%

Rain0.19 in

Visibility4 mi

Cloud Ceiling2000 ft

8 PM

76°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 72%
Chevron down
Rain
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

RealFeel Shade™76°

WindWSW 8 mph

Air QualityPoor

Max UV Index0.1 (Low)

Wind Gusts18 mph

Humidity85%

Indoor Humidity85% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Rain0.04 in

Visibility7 mi

Cloud Ceiling4000 ft

9 PM

74°
RealFeel® 73°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 72%
Chevron down
Rain
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

WindW 8 mph

Air QualityPoor

Wind Gusts17 mph

Humidity87%

Indoor Humidity87% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Rain0.04 in

Visibility6 mi

Cloud Ceiling3400 ft

10 PM

71°
RealFeel® 73°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

WindW 8 mph

Air QualityPoor

Wind Gusts16 mph

Humidity92%

Indoor Humidity92% (Very Humid)

Dew Point69° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling1600 ft

11 PM

71°
RealFeel® 72°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy
alerts

Flood Watch

7:00 AM Sunday - 1:00 AM Monday

WindWNW 8 mph

Air QualityPoor

Wind Gusts15 mph

Humidity91%

Indoor Humidity91% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility10 mi

Cloud Ceiling1400 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 70° with a RealFeel® of 69°, partly cloudy with a 14% 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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