# Daily Forecast

**Location**  
Herndon, 20170, Virginia, United States  
As of 9:12 pm GMT-4

## Day Conditions
| Day        | Conditions          | Temperature  | Wind      |
|------------|---------------------|--------------|-----------|
| Tonight    | Scattered Showers    | 69° - 85°    | 5 mph NNW |
| Sat 15    | Partly Cloudy       | 73° - 87°    | 5 mph ENE |
| Sun 16    | Thunderstorms       | 74° - 81°    | 11 mph S  |
| Mon 17    | Partly Cloudy       | 68° - 90°    | 11 mph NW |
| Tue 18    | Mostly Clear        | 65° - 85°    | 7 mph NNW |
| Wed 19    | Mostly Clear        | 72° - 88°    | 8 mph SW  |
| Thu 20    | Scattered Thunderstorms | 65° - 87°| 8 mph NW  |
| Fri 21    | Partly Cloudy       | 66° - 81°    | 7 mph N   |
| Sat 22    | Showers             | 65° - 77°    | 8 mph NE  |
| Sun 23    | Scattered Showers    | 66° - 78°    | 7 mph NNE |
| Mon 24    | Partly Cloudy       | 67° - 85°    | 6 mph W   |
| Tue 25    | Partly Cloudy       | 69° - 88°    | 7 mph W   |
| Wed 26    | Partly Cloudy       | 70° - 88°    | 7 mph W   |
| Thu 27    | Partly Cloudy       | 67° - 86°    | 7 mph WNW |
| Fri 28    | Partly Cloudy       | 66° - 84°    | 7 mph NW  |

## Air Quality Index
63  
**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.  
[See details](/content/en-RW/forecast/air-quality/l/38.97,-77.386)

## Health & Activities
- **Grass**  
Seasonal Allergies and Pollen Count Forecast  
Grass pollen is moderate in your area
- **Flu**  
Cold & Flu Forecast  
Flu risk is very low in your area