# Herndon Weather

## Location
Herndon, 20170, Virginia, United States

## Current Conditions
- **Temperature**: 77°
- **Feels Like**: 77°
- **High**: 85°
- **Low**: 69°
- **Chance of Rain**: 5%

## 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°         |
| 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°         |
| 22:00  | Partly Cloudy Night | 76°         |
| 23:00  | Partly Cloudy Night | 75°         |

## Wind
- **Wind Speed**: 4 mph N

## Humidity
- **Humidity**: 81%

## Air Quality
- **Index**: 63 - Moderate

## Dew Point
- **Dew Point**: 71°

## Pressure
- **Pressure**: 30.04 in

## UV Index
- **UV Index**: 0 of 11

## Visibility
- **Visibility**: 10 mi

## Moon Phase
- **Moon Phase**: Waxing Crescent
- **Sunrise**: 6:21
- **Sunset**: 20:05

# Daily Forecast
| Date     | Condition                | Chance of Rain | 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
- **Index**: 63
- **Rating**: Moderate
- **Description**: Air quality is acceptable; however, 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