# Herndon Weather

## Location
Herndon, 20170, Virginia, United States

As of 21:02 GMT-4

[Now 79° 78° 77°  
Cloudy  
Feels Like 77°  
High 85°  
Low 69°  
Chance of Rain 8%  
0 in](/content/en-RW/us/virginia/herndon/postcode/20170/hourbyhour/index.html)

## Today's outlook
Tonight's low temperature will be nearly the same as 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°        |
| 6:21  | Sunrise              |             |
| 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°        |
| 20:05 | Sunset               |             |

### Current Conditions
- **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**: 6:21  
- **Sunset**: 20:05

## Daily Forecast
| Date       | Condition               | Rain Chance | 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
- **Rating**: 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-RW/forecast/air-quality/l/38.97,-77.386)

## Health & Activities
- **Pollen Count**: Grass pollen is moderate in your area  
- **Flu Risk**: Flu risk is very low in your area.