# Herndon Weather

## Location
Herndon, 20170, Virginia, United States

As of 9:22 pm GMT-4

**Now**: 79° - 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   | Weather                | Temperature |
|--------|-----------------------|-------------|
| 00:00  | Cloudy                | 77°         |
| 01:00  | Mostly Cloudy Night   | 77°         |
| 02:00  | Mostly Cloudy Night   | 76°         |
| 03:00  | Mostly Cloudy Night   | 76°         |
| 04:00  | Mostly Cloudy Night   | 77°         |
| 05:00  | Mostly Cloudy Night   | 76°         |
| 06:00  | Mostly Cloudy Night   | 75°         |
| 07:00  | Cloudy                | 74°         |
| 08:00  | Partly Cloudy Day     | 76°         |
| 09:00  | 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
- Speed: 4 mph N

### Humidity
- 81%

### Air Quality
- Index: 63 - Moderate
- Dew Point: 71°
- Pressure: 30.05 in
- UV Index: 0 of 11
- Visibility: 10 mi

### Moon Phase
- Waxing Crescent
- Sunrise: 06:21
- Sunset: 20:05

# Daily Forecast
| Date     | Weather            | 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
- 63
- Moderate, health concern for sensitive individuals.

### 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.