View hourly forecasts 10-days ahead
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9 PM
85°
RealFeel®
92°
Hot
6%
Intermittent clouds
Heat Index92°
WindSSW 7 mph
Air QualityFair
Wind Gusts9 mph
Humidity71%
Indoor Humidity71% (Extremely Humid)
Dew Point74° F
AccuLumen Brightness Index™0 (Dark)
Cloud Cover55%
Visibility10 mi
Cloud Ceiling30000 ft
10 PM
82°
RealFeel®
88°
Very Warm
5%
Intermittent clouds
Heat Index87°
WindSSW 7 mph
Air QualityFair
Wind Gusts7 mph
Humidity76%
Indoor Humidity76% (Extremely Humid)
Dew Point74° F
AccuLumen Brightness Index™0 (Dark)
Cloud Cover65%
Visibility10 mi
Cloud Ceiling30000 ft
11 PM
80°
RealFeel®
85°
Very Warm
3%
Intermittent clouds
Heat Index84°
WindSSW 7 mph
Air QualityFair
Wind Gusts7 mph
Humidity81%
Indoor Humidity81% (Extremely Humid)
Dew Point73° F
AccuLumen Brightness Index™0 (Dark)
Cloud Cover58%
Visibility10 mi
Cloud Ceiling30000 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 85° with a RealFeel® of 92°, intermittent clouds with a 6% 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.
