Alton, MO

Hourly

1 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 8% Cloudy

• RealFeel Shade™: 84°
• Heat Index: 86°
• Wind: N 7 mph
• Air Quality: Fair
• Max UV Index: 5.7 (High)
• Wind Gusts: 12 mph
• Humidity: 61%
• Indoor Humidity: 61% (Very Humid)
• Dew Point: 68° F
• AccuLumen Brightness Index™: 2 (Dark)
• Cloud Cover: 90%
• Visibility: 10 mi
• Cloud Ceiling: 20800 ft

2 PM

84° 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 49% Mostly cloudy

• RealFeel Shade™: 85°
• Heat Index: 87°
• Wind: N 8 mph
• Air Quality: Fair
• Max UV Index: 5.4 (Moderate)
• Wind Gusts: 13 mph
• Humidity: 58%
• Indoor Humidity: 58% (Very Humid)
• Dew Point: 68° F
• AccuLumen Brightness Index™: 3 (Dull)
• Cloud Cover: 89%
• Visibility: 10 mi
• Cloud Ceiling: 20800 ft

3 PM

82° 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 70% Thunderstorms

• RealFeel Shade™: 83°
• Heat Index: 88°
• Wind: N 9 mph
• Air Quality: Fair
• Max UV Index: 1.7 (Low)
• Wind Gusts: 13 mph
• Humidity: 77%
• Indoor Humidity: 77% (Extremely Humid)
• Dew Point: 74° F
• AccuLumen Brightness Index™: 3 (Dull)
• Cloud Cover: 89%
• Rain: 0.20 in
• Visibility: 3 mi
• Cloud Ceiling: 2000 ft

4 PM

80° RealFeel® 80° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 70% Thunderstorms

• RealFeel Shade™: 79°
• Heat Index: 83°
• Wind: N 9 mph
• Air Quality: Fair
• Max UV Index: 1.1 (Low)
• Wind Gusts: 13 mph
• Humidity: 80%
• Indoor Humidity: 80% (Extremely Humid)
• Dew Point: 73° F
• AccuLumen Brightness Index™: 2 (Dark)
• Cloud Cover: 90%
• Rain: 0.20 in
• Visibility: 3 mi
• Cloud Ceiling: 4000 ft

5 PM

77° RealFeel® 83° 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 35% Mostly cloudy

• RealFeel Shade™: 80°
• Wind: N 8 mph
• Air Quality: Fair
• Max UV Index: 1.8 (Low)
• Wind Gusts: 12 mph
• Humidity: 83%
• Indoor Humidity: 83% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 3 (Dull)
• Cloud Cover: 89%
• Visibility: 10 mi
• Cloud Ceiling: 20800 ft

6 PM

79° RealFeel® 80° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 29% Mostly cloudy

• RealFeel Shade™: 79°
• Wind: N 7 mph
• Air Quality: Fair
• Max UV Index: 1.1 (Low)
• Wind Gusts: 12 mph
• Humidity: 65%
• Indoor Humidity: 65% (Humid)
• Dew Point: 66° F
• AccuLumen Brightness Index™: 3 (Dull)
• Cloud Cover: 89%
• Visibility: 10 mi
• Cloud Ceiling: 20800 ft

7 PM

77° RealFeel® 77° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 35% Cloudy

• RealFeel Shade™: 77°
• Wind: N 6 mph
• Air Quality: Fair
• Max UV Index: 0.6 (Low)
• Wind Gusts: 10 mph
• Humidity: 64%
• Indoor Humidity: 64% (Humid)
• Dew Point: 64° F
• AccuLumen Brightness Index™: 2 (Dark)
• Cloud Cover: 90%
• Visibility: 10 mi
• Cloud Ceiling: 20800 ft

8 PM

74° RealFeel® 70° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 64% Thunderstorms

• RealFeel Shade™: 70°
• Wind: N 6 mph
• Air Quality: Fair
• Max UV Index: 0.1 (Low)
• Wind Gusts: 9 mph
• Humidity: 77%
• Indoor Humidity: 77% (Humid)
• Dew Point: 66° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 91%
• Rain: 0.15 in
• Visibility: 4 mi
• Cloud Ceiling: 2000 ft

9 PM

71° RealFeel® 70° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 49% Cloudy

• Wind: N 6 mph
• Air Quality: Fair
• Wind Gusts: 8 mph
• Humidity: 82%
• Indoor Humidity: 82% (Humid)
• Dew Point: 65° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 92%
• Visibility: 10 mi
• Cloud Ceiling: 14700 ft

10 PM

70° RealFeel® 69° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 49% Cloudy

• Wind: N 6 mph
• Air Quality: Fair
• Wind Gusts: 7 mph
• Humidity: 81%
• Indoor Humidity: 81% (Humid)
• Dew Point: 64° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 90%
• Visibility: 10 mi
• Cloud Ceiling: 11600 ft

11 PM

70° RealFeel® 68° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 49% Mostly cloudy

• Wind: N 6 mph
• Air Quality: Fair
• Wind Gusts: 8 mph
• Humidity: 76%
• Indoor Humidity: 76% (Slightly Humid)
• Dew Point: 62° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 84%
• Visibility: 10 mi
• Cloud Ceiling: 15700 ft