Herndon, VA

Hourly

12 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 7% Partly sunny

• RealFeel Shade™: 78°
• Wind: WSW 15 mph
• Air Quality: Fair
• Max UV Index: 8 (Very High)
• Wind Gusts: 17 mph
• Humidity: 46%
• Indoor Humidity: 46% (Slightly Humid)
• Dew Point: 59° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 44%
• Visibility: 10 mi
• Cloud Ceiling: 33000 ft

1 PM

83° 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 11% Partly sunny

• RealFeel Shade™: 80°
• Wind: WSW 14 mph
• Air Quality: Fair
• Max UV Index: 9 (Very High)
• Wind Gusts: 18 mph
• Humidity: 42%
• Indoor Humidity: 42% (Slightly Humid)
• Dew Point: 58° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

2 PM

85° 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 25% Partly sunny

• RealFeel Shade™: 82°
• Wind: SW 8 mph
• Air Quality: Fair
• Max UV Index: 8 (Very High)
• Wind Gusts: 13 mph
• Humidity: 39%
• Indoor Humidity: 39% (Slightly Humid)
• Dew Point: 57° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

3 PM

85° RealFeel® 89° 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 25% Partly sunny

• RealFeel Shade™: 82°
• Wind: SW 9 mph
• Air Quality: Fair
• Max UV Index: 6 (High)
• Wind Gusts: 14 mph
• Humidity: 37%
• Indoor Humidity: 37% (Slightly Humid)
• Dew Point: 56° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

4 PM

86° RealFeel® 88° 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 31% Partly sunny

• RealFeel Shade™: 83°
• Wind: SSW 10 mph
• Air Quality: Fair
• Max UV Index: 4 (Moderate)
• Wind Gusts: 14 mph
• Humidity: 35%
• Indoor Humidity: 35% (Slightly Humid)
• Dew Point: 56° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

5 PM

85° 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 51% Partly sunny w/ t-storms

• RealFeel Shade™: 79°
• Wind: SSW 10 mph
• Air Quality: Fair
• Max UV Index: 3 (Moderate)
• Wind Gusts: 15 mph
• Humidity: 40%
• Indoor Humidity: 40% (Slightly Humid)
• Dew Point: 58° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 45%
• Rain: 0.05 in
• Visibility: 5 mi
• Cloud Ceiling: 30000 ft

6 PM

83° 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 47% Partly sunny

• RealFeel Shade™: 80°
• Wind: SSW 9 mph
• Air Quality: Fair
• Max UV Index: 2 (Low)
• Wind Gusts: 12 mph
• Humidity: 42%
• Indoor Humidity: 42% (Slightly Humid)
• Dew Point: 58° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

7 PM

82° RealFeel® 80° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 43% Partly sunny

• RealFeel Shade™: 80°
• Wind: SSW 8 mph
• Air Quality: Fair
• Max UV Index: 1 (Low)
• Wind Gusts: 10 mph
• Humidity: 42%
• Indoor Humidity: 42% (Slightly Humid)
• Dew Point: 57° F
• AccuLumen Brightness Index™: 4 (Dull)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

8 PM

80° RealFeel® 77° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 47% Partly sunny

• RealFeel Shade™: 77°
• Wind: SW 7 mph
• Air Quality: Fair
• Max UV Index: 0 (Low)
• Wind Gusts: 14 mph
• Humidity: 47%
• Indoor Humidity: 47% (Slightly Humid)
• Dew Point: 58° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 45%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

9 PM

77° RealFeel® 72° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 51% Partly cloudy w/ t-storms

• Wind: SW 7 mph
• Air Quality: Fair
• Wind Gusts: 14 mph
• Humidity: 53%
• Indoor Humidity: 53% (Slightly Humid)
• Dew Point: 59° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 45%
• Rain: 0.04 in
• Visibility: 6 mi
• Cloud Ceiling: 30000 ft

10 PM

75° RealFeel® 72° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 47% Partly cloudy

• Wind: SW 7 mph
• Air Quality: Fair
• Wind Gusts: 15 mph
• Humidity: 57%
• Indoor Humidity: 57% (Slightly Humid)
• Dew Point: 59° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 44%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

11 PM

72° RealFeel® 70° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 28% Mostly clear

• Wind: SSW 7 mph
• Air Quality: Fair
• Wind Gusts: 16 mph
• Humidity: 63%
• Indoor Humidity: 63% (Slightly Humid)
• Dew Point: 59° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 26%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft