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Daily risk for severe t-storms across the Plains and Midwest this week. Get the forecast. Chevron right

St. Clair, MO

85°F
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St. Clair

Missouri

85°
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St. Clair, MO Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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3 PM

83°
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 47%
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Mostly cloudy

RealFeel Shade™86°

Heat Index87°

WindSSE 8 mph

Air QualityFair

Max UV Index3.4 (Moderate)

Wind Gusts16 mph

Humidity69%

Indoor Humidity69% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover88%

Visibility10 mi

Cloud Ceiling13600 ft

4 PM

82°
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 51%
Chevron down
Thunderstorms

RealFeel Shade™82°

Heat Index87°

WindSSE 7 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts17 mph

Humidity68%

Indoor Humidity68% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Rain0.05 in

Visibility5 mi

Cloud Ceiling4000 ft

5 PM

82°
RealFeel® 87°
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 47%
Chevron down
Cloudy

RealFeel Shade™85°

Heat Index86°

WindSE 7 mph

Air QualityFair

Max UV Index1.5 (Low)

Wind Gusts16 mph

Humidity68%

Indoor Humidity68% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling14700 ft

6 PM

82°
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 47%
Chevron down
Cloudy

RealFeel Shade™86°

Heat Index86°

WindSE 7 mph

Air QualityFair

Max UV Index0.9 (Low)

Wind Gusts15 mph

Humidity70%

Indoor Humidity70% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Visibility10 mi

Cloud Ceiling14700 ft

7 PM

80°
RealFeel® 81°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 51%
Chevron down
Thunderstorms

RealFeel Shade™81°

Heat Index83°

WindSE 7 mph

Air QualityFair

Max UV Index0.3 (Low)

Wind Gusts13 mph

Humidity77%

Indoor Humidity77% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™2 (Dark)

Cloud Cover90%

Rain0.05 in

Visibility5 mi

Cloud Ceiling4000 ft

8 PM

77°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 64%
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Rain

RealFeel Shade™78°

WindSE 6 mph

Air QualityFair

Max UV Index0.1 (Low)

Wind Gusts13 mph

Humidity81%

Indoor Humidity81% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover91%

Rain0.04 in

Visibility8 mi

Cloud Ceiling4000 ft

9 PM

75°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 65%
Chevron down
Rain

WindSSE 6 mph

Air QualityFair

Wind Gusts13 mph

Humidity87%

Indoor Humidity87% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover94%

Rain0.04 in

Visibility6 mi

Cloud Ceiling4000 ft

10 PM

73°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy

WindSSE 6 mph

Air QualityFair

Wind Gusts13 mph

Humidity93%

Indoor Humidity93% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover94%

Visibility10 mi

Cloud Ceiling7100 ft

11 PM

73°
RealFeel® 77°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 49%
Chevron down
Cloudy

WindSSE 6 mph

Air QualityFair

Wind Gusts12 mph

Humidity91%

Indoor Humidity91% (Very Humid)

Dew Point70° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover94%

Visibility10 mi

Cloud Ceiling5500 ft

Hourly Weather Forecast for St. Clair

AccuWeather's hourly forecast for St. Clair provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 83° with a RealFeel® of 91°, mostly cloudy with a 47% 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 St. Clair:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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