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
Now: 79°
Condition: Mostly Cloudy Night
Feels Like: 77°
High: 83°
Low: 68°
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 | Cloudy | 77° |
| 1:00 | Mostly Cloudy Night | 77° |
| 2:00 | Mostly Cloudy Night | 76° |
| 3:00 | Mostly Cloudy Night | 76° |
| 4:00 | Mostly Cloudy Night | 77° |
| 5:00 | Mostly Cloudy Night | 76° |
| 6:00 | Mostly Cloudy Night | 75° |
| 7:00 | Cloudy | 74° |
| 8:00 | Partly Cloudy Day | 76° |
| 9:00 | Mostly Cloudy Day | 77° |
| 10:00 | Mostly Cloudy Day | 77° |
| 11:00 | Cloudy | 79° |
| 12:00 | Cloudy | 78° |
| 13:00 | Cloudy | 77° |
| 14:00 | Mostly Cloudy Day | 76° |
| 15:00 | Mostly Cloudy Day | 78° |
| 16:00 | Partly Cloudy Day | 82° |
| 17:00 | Mostly Cloudy Day | 82° |
| 18:00 | Mostly Cloudy Day | 82° |
| 19:00 | Mostly Cloudy Day | 80° |
| 20:00 | Cloudy | 78° |
| 21:00 | Cloudy | 77° |
Wind: 4 mph N
Humidity: 81%
Air Quality: 61 - Moderate
Dew Point: 71°
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 | Rain Chance | Low | High |
|---|---|---|---|---|
| Tonight | Partly Cloudy Night | 8% | 68° | 83° |
| Sat 15 | Mostly Clear Day | 7% | 73° | 87° |
| Sun 16 | Thunderstorms | 81% | 73° | 78° |
| Mon 17 | Partly Cloudy Day | 23% | 68° | 89° |
| Tue 18 | Mostly Clear Day | 5% | 65° | 85° |
| Wed 19 | Mostly Clear Day | 7% | 71° | 88° |
| Thu 20 | Scattered Thunderstorms | 52% | 66° | 87° |
Air Quality Index
Score: 61
Level: 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