# Herndon Weather

## Location
Herndon, 20170, Virginia, United States

·

As of 9:20 pm GMT-4

## Now
79°

- Mostly Cloudy Night  
- Feels Like 77°  
- High 83°  
- Low 68°  
- Chance of Rain 7%  
- 0 in

## Today's outlook
Tonight's low temperature will be a little cooler than last night's.

### Hourly Forecast
| Time   | Condition             | 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
- Wind: 4 mph N

## Humidity
- Humidity: 81%

## Air Quality
- Air Quality Index: 40 - Good

## Dew Point
- Dew Point: 71°

## Pressure
- Pressure: 30.05 in

## UV Index
- UV Index: 0 of 11

## Visibility
- Visibility: 10 mi

## Moon Phase
- Waxing Crescent

### Daily Forecast
| Date                | Condition              | Chance of Rain | 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
- 40
- Good
- Minimal impact.

## 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