Weather forecast and conditions for Herndon, 20170, Virginia, United States - The Weather Channel | weather.com
Herndon Weather
Location
Herndon, 20170, Virginia, United States
As of 21:22 GMT-4
Current Weather
- Temperature: 79°F
- Condition: Mostly Cloudy Night
- Feels Like: 77°F
- High: 83°F
- Low: 68°F
- Chance of Rain: 7%
Today's outlook
Tonight's low temperature will be a little cooler than last night's.
Hourly Forecast
| Time | Condition | Temperature |
|---|---|---|
| 0:00 | Mostly Cloudy Night | 77°F |
| 1:00 | Mostly Cloudy Night | 77°F |
| 2:00 | Mostly Cloudy Night | 76°F |
| 3:00 | Mostly Cloudy Night | 76°F |
| 4:00 | Mostly Cloudy Night | 77°F |
| 5:00 | Mostly Cloudy Night | 76°F |
| 6:00 | Mostly Cloudy Night | 75°F |
| 7:00 | Partly Cloudy Day | 69°F |
| 8:00 | Partly Cloudy Day | 76°F |
| 9:00 | Mostly Cloudy Day | 77°F |
| 10:00 | Mostly Cloudy Day | 77°F |
| 11:00 | Cloudy | 79°F |
| 12:00 | Cloudy | 78°F |
| 13:00 | Cloudy | 77°F |
| 14:00 | Mostly Cloudy Day | 76°F |
| 15:00 | Mostly Cloudy Day | 78°F |
| 16:00 | Partly Cloudy Day | 82°F |
| 17:00 | Mostly Cloudy Day | 82°F |
| 18:00 | Mostly Cloudy Day | 82°F |
| 19:00 | Mostly Cloudy Day | 80°F |
| 20:00 | Cloudy | 78°F |
| 21:00 | Cloudy | 77°F |
Wind
- Speed: 4 mph N
Humidity
- 81%
Air Quality
- Index: 61 (Moderate)
- Dew Point: 71°F
- Pressure: 30.05 in
- UV Index: 0 of 11
- Visibility: 10 mi
- Moon Phase: Waxing Crescent
- Sunrise: 6:21
- Sunset: 20:05
Daily Forecast
| Date | Condition | Chance of Rain | Low | High |
|---|---|---|---|---|
| Tonight | Partly Cloudy | 8% | 68°F | 83°F |
| Sat 15 | Mostly Sunny | 7% | 73°F | 87°F |
| Sun 16 | Thunderstorms | 81% | 73°F | 78°F |
| Mon 17 | Partly Cloudy | 23% | 68°F | 89°F |
| Tue 18 | Mostly Sunny | 5% | 65°F | 85°F |
| Wed 19 | Mostly Sunny | 7% | 71°F | 88°F |
| Thu 20 | PM T-Storms | 52% | 66°F | 87°F |
Air Quality Index
- 61 (Moderate): Air quality is acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
Health & Activities
- Grass Pollen: Moderate in your area.
- Flu Risk: Very Low in your area.