Thornhill, VA

Hourly

12 PM

86° RealFeel® 98° 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 5% Partly sunny

• RealFeel Shade™: 89°
• Wind: W 8 mph
• Air Quality: Excellent
• Max UV Index: 10 (Very High)
• Wind Gusts: 16 mph
• Humidity: 60%
• Indoor Humidity: 60% (Very Humid)
• Dew Point: 71° F
• AccuLumen Brightness Index™: 9 (Very Bright)
• Cloud Cover: 36%
• Visibility: 10 mi
• Cloud Ceiling: 34000 ft

1 PM

87° RealFeel® 100° 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% Intermittent clouds

• RealFeel Shade™: 91°
• Wind: W 8 mph
• Air Quality: Fair
• Max UV Index: 10 (Very High)
• Wind Gusts: 18 mph
• Humidity: 59%
• Indoor Humidity: 59% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 50%
• Visibility: 10 mi
• Cloud Ceiling: 20000 ft

2 PM

88° RealFeel® 97° 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 43% Cloudy

• RealFeel Shade™: 91°
• Wind: WNW 8 mph
• Air Quality: Fair
• Max UV Index: 5 (Moderate)
• Wind Gusts: 20 mph
• Humidity: 56%
• Indoor Humidity: 56% (Very Humid)
• Dew Point: 71° F
• AccuLumen Brightness Index™: 2 (Dark)
• Cloud Cover: 93%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

3 PM

89° RealFeel® 96° 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 47% Cloudy

• RealFeel Shade™: 92°
• Wind: WNW 8 mph
• Air Quality: Fair
• Max UV Index: 4 (Moderate)
• Wind Gusts: 20 mph
• Humidity: 53%
• Indoor Humidity: 53% (Very Humid)
• Dew Point: 70° F
• AccuLumen Brightness Index™: 1 (Dark)
• Cloud Cover: 95%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

4 PM

89° 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 51% Thunderstorms

• RealFeel Shade™: 90°
• Wind: WNW 8 mph
• Air Quality: Fair
• Max UV Index: 1 (Low)
• Wind Gusts: 20 mph
• Humidity: 56%
• Indoor Humidity: 56% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 1 (Dark)
• Cloud Cover: 95%
• Rain: 0.04 in
• Visibility: 6 mi
• Cloud Ceiling: 4000 ft

5 PM

91° 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 18% Cloudy

• RealFeel Shade™: 94°
• Wind: WNW 8 mph
• Air Quality: Fair
• Max UV Index: 2 (Low)
• Wind Gusts: 18 mph
• Humidity: 50%
• Indoor Humidity: 50% (Very Humid)
• Dew Point: 70° F
• AccuLumen Brightness Index™: 1 (Dark)
• Cloud Cover: 99%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

6 PM

89° RealFeel® 93° 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 14% Cloudy

• RealFeel Shade™: 93°
• Wind: WNW 7 mph
• Air Quality: Fair
• Max UV Index: 1 (Low)
• Wind Gusts: 14 mph
• Humidity: 53%
• Indoor Humidity: 53% (Very Humid)
• Dew Point: 70° F
• AccuLumen Brightness Index™: 1 (Dark)
• Cloud Cover: 99%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

7 PM

86° 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 12% Cloudy

• RealFeel Shade™: 90°
• Wind: WNW 6 mph
• Air Quality: Fair
• Max UV Index: 1 (Low)
• Wind Gusts: 10 mph
• Humidity: 58%
• Indoor Humidity: 58% (Very Humid)
• Dew Point: 70° F
• AccuLumen Brightness Index™: 1 (Dark)
• Cloud Cover: 99%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

8 PM

83° 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 8% Partly sunny

• RealFeel Shade™: 86°
• Wind: WNW 5 mph
• Air Quality: Fair
• Max UV Index: 0 (Low)
• Wind Gusts: 10 mph
• Humidity: 63%
• Indoor Humidity: 63% (Very Humid)
• Dew Point: 69° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

9 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 8% Partly cloudy

• Wind: WNW 4 mph
• Air Quality: Fair
• Wind Gusts: 9 mph
• Humidity: 72%
• Indoor Humidity: 72% (Very Humid)
• Dew Point: 70° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

10 PM

77° RealFeel® 81° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 8% Partly cloudy

• Wind: WNW 4 mph
• Air Quality: Fair
• Wind Gusts: 9 mph
• Humidity: 79%
• Indoor Humidity: 79% (Very Humid)
• Dew Point: 70° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

11 PM

74° RealFeel® 78° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 8% Partly cloudy

• Wind: WNW 4 mph
• Air Quality: Fair
• Wind Gusts: 8 mph
• Humidity: 87%
• Indoor Humidity: 87% (Very Humid)
• Dew Point: 70° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft