# Herndon Weather

## Location
Herndon, 20170, Virginia, United States

## As of 9:02 PM EDT

### Now
**79°**  
**Cloudy**  
**Feels Like 77°**  
**High 85°**  
**Low 69°**  
**Chance of Rain 8%**

## Today's outlook
Tonight's low temperature will be nearly the same as 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  | Partly Cloudy Day   | 70°         |
| 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°         |

### Wind
**4 mph NNE**

### Humidity
**81%**

### Air Quality
**63 - Moderate**

### Dew Point
**71°**

### Pressure
**30.04 in**

### UV Index
**0 of 11**

### Visibility
**10 mi**

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

# Daily Forecast
| Date      | Summary                 | Rain Probability | Low | High |
|-----------|-------------------------|------------------|-----|------|
| Tonight   | Scattered Showers Night | 39%              | 69° | 85°  |
| Sat 15   | Partly Cloudy Day       | 7%               | 73° | 87°  |
| Sun 16   | Thunderstorms           | 89%              | 74° | 81°  |
| Mon 17   | Partly Cloudy Day       | 15%              | 68° | 90°  |
| Tue 18   | Mostly Clear Day        | 5%               | 65° | 85°  |
| Wed 19   | Mostly Clear Day        | 7%               | 72° | 88°  |
| Thu 20   | Scattered Thunderstorms  | 50%              | 65° | 87°  |

## 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.

## Health & Activities
- **Grass seasonal allergies and pollen count forecast:**  Grass pollen is moderate in your area.
- **Cold & Flu Forecast:** Flu risk is very low in your area.