O'Fallon, MO

Hourly

6 PM

87° RealFeel® 95° 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 44% Thunderstorms

• RealFeel Shade™: 95°
• Wind: SSW 6 mph
• Air Quality: Fair
• Max UV Index: 1 (Low)
• Wind Gusts: 7 mph
• Humidity: 66%
• Indoor Humidity: 66% (Extremely Humid)
• Dew Point: 75° F
• AccuLumen Brightness Index™: 3 (Dull)
• Cloud Cover: 89%
• Visibility: 10 mi
• Cloud Ceiling: 4000 ft

7 PM

85° RealFeel® 94° 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 44% Intermittent clouds

• RealFeel Shade™: 94°
• Wind: SSW 6 mph
• Air Quality: Fair
• Max UV Index: 1 (Low)
• Wind Gusts: 7 mph
• Humidity: 71%
• Indoor Humidity: 71% (Extremely Humid)
• Dew Point: 75° F
• AccuLumen Brightness Index™: 4 (Dull)
• Cloud Cover: 71%
• Visibility: 10 mi
• Cloud Ceiling: 20800 ft

8 PM

83° RealFeel® 90° 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 34% Partly sunny

• RealFeel Shade™: 90°
• Wind: SSW 6 mph
• Air Quality: Fair
• Max UV Index: 0 (Low)
• Wind Gusts: 13 mph
• Humidity: 74%
• Indoor Humidity: 74% (Extremely Humid)
• Dew Point: 74° F
• AccuLumen Brightness Index™: 1 (Dark)
• Cloud Cover: 46%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

9 PM

80° 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 34% Partly cloudy

• Wind: S 5 mph
• Air Quality: Fair
• Wind Gusts: 13 mph
• Humidity: 77%
• Indoor Humidity: 77% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 46%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

10 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 37% Partly cloudy

• Wind: S 5 mph
• Air Quality: Fair
• Wind Gusts: 13 mph
• Humidity: 84%
• Indoor Humidity: 84% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 46%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

11 PM

74° RealFeel® 80° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 47% Partly cloudy

• Wind: SSW 5 mph
• Air Quality: Fair
• Wind Gusts: 10 mph
• Humidity: 92%
• Indoor Humidity: 92% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 46%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft