# Daily Forecast

## Location
Herndon, 20170, Virginia, United States

·

As of 9:24 pm GMT-4

### Day Conditions
| Day        | Conditions       | Temperature | Low | High | Wind    |
|------------|------------------|-------------|-----|------|---------|
| Tonight    | Partly Cloudy    | 68°        | 68° | 83°  | 4 mph   |
| Sat 15    | Mostly Clear      | 73°        | 73° | 87°  | 5 mph   |
| Sun 16    | Thunderstorms     | 73°        | 73° | 78°  | 11 mph  |
| Mon 17    | Partly Cloudy    | 68°        | 68° | 89°  | 10 mph  |
| Tue 18    | Mostly Clear      | 65°        | 65° | 85°  | 7 mph   |
| Wed 19    | Mostly Clear      | 71°        | 71° | 88°  | 7 mph   |
| Thu 20    | Scattered Thunderstorms | 66°    | 66° | 87°  | 8 mph   |
| Fri 21    | Partly Cloudy    | 66°        | 66° | 82°  | 7 mph   |
| Sat 22    | Showers          | 66°        | 66° | 78°  | 7 mph   |
| Sun 23    | Showers          | 66°        | 66° | 79°  | 7 mph   |
| Mon 24    | Partly Cloudy    | 67°        | 67° | 85°  | 6 mph   |
| Tue 25    | Partly Cloudy    | 69°        | 69° | 88°  | 6 mph   |
| Wed 26    | Partly Cloudy    | 69°        | 69° | 88°  | 8 mph   |
| Thu 27    | Partly Cloudy    | 66°        | 66° | 86°  | 8 mph   |
| Fri 28    | Partly Cloudy    | 66°        | 66° | 83°  | 7 mph   |

## 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-SL/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