# Herndon Weather

## Location
Herndon, 20170, Virginia, United States

## Current Weather
As of 9:22 pm GMT-4

- **Now**: 79° (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 |
|------|--------------------------|-------------|
| 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**: 4mph N
- **Humidity**: 81%
- **Air Quality**: 61 - Moderate
- **Dew Point**: 71°
- **Pressure**: 30.05in
- **UV Index**: 0 of 11
- **Visibility**: 10 mi
- **Moon Phase**: Waxing Crescent
- **Sunrise**: 06:21
- **Sunset**: 20:05

# Daily Forecast
| Date | Condition           | Chance of Rain | High | Low |
|------|---------------------|----------------|------|-----|
| Tonight | Partly Cloudy Night | 8%           | 83°  | 68° |
| Sat 15 | Mostly Clear Day    | 7%           | 87°  | 73° |
| Sun 16 | Thunderstorms       | 81%          | 78°  | 73° |
| Mon 17 | Partly Cloudy Day   | 23%          | 89°  | 68° |
| Tue 18 | Mostly Clear Day     | 5%           | 85°  | 65° |
| Wed 19 | Mostly Clear Day     | 7%           | 88°  | 71° |
| Thu 20 | Scattered Thunderstorms | 52%       | 87°  | 66° |

## Air Quality Index
- **Index**: 61 - Moderate
- **Description**: 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-FJ/forecast/air-quality/l/38.97,-77.386)

## Health & Activities
- **Seasonal Allergies**: Grass pollen is moderate in your area.  
- **Flu Risk**: Very low in your area.