# Herndon Weather

**Location**: Herndon, 20170, Virginia, United States

**As of**: 21:22 GMT-4  
**Now**: 79°  
**Condition**: 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   | Condition              | Temperature |
|--------|------------------------|-------------|
| 0:00   | Cloudy                 | 77°         |
| 1:00   | Mostly Cloudy Night    | 77°         |
| 2:00   | Mostly Cloudy Night    | 76°         |
| 3:00   | Mostly Cloudy Night    | 76°         |
| 4:00   | Mostly Cloudy Night    | 77°         |
| 5:00   | Mostly Cloudy Night    | 76°         |
| 6:00   | Mostly Cloudy Night    | 75°         |
| 7:00   | Cloudy                 | 74°         |
| 8:00   | Partly Cloudy Day      | 76°         |
| 9:00   | 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**: 4 mph N  
**Humidity**: 81%  
**Air Quality**: 61 - Moderate  
**Dew Point**: 71°  
**Pressure**: 30.05 in  
**UV Index**: 0 of 11  
**Visibility**: 10 mi  
**Moon Phase**: Waxing Crescent  
**Sunrise**: 6:21  
**Sunset**: 20:05

## Daily Forecast
| Date      | Condition                | 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
**Score**: 61  
**Level**: 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 Pollen**: Moderate in your area  
**Flu Risk**: Very low in your area