# Herndon Weather

## Location
Herndon, 20170, Virginia, United States

·  
As of 9:02 pm GMT-4  
[Now79°78°77°\
\
Cloudy\
\
Cloudy\
\
Feels Like\
\
77°\
\
HHigh\
\
85°\
\
LLow\
\
69°\
\
Chance of Rain\
\
8%\
\
0 in](/content/en-GY/us/virginia/herndon/postcode/20170/hourbyhour/index.html)

## Today's outlook
Tonight's low temperature will be nearly the same as last night's.

| Time  | Weather 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°         |
| 22:00 | Partly Cloudy Night     | 76°         |
| 23:00 | Partly Cloudy Night     | 74°         |
| 00:00 | Partly Cloudy Night     | 74°         |
| 01:00 | Partly Cloudy Night     | 73°         |
| 02:00 | Partly Cloudy Night     | 72°         |
| 03:00 | Partly Cloudy Night     | 72°         |
| 04:00 | Partly Cloudy Night     | 71°         |
| 05:00 | Partly Cloudy Night     | 70°         |
| 06:00 | Partly Cloudy Night     | 70°         |
| 07:00 | Partly Cloudy Day       | 70°         |

## Wind
Wind: 4 mph NNE  
Humidity: 81%  
Air Quality: 61 - 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  | Weather            | Precipitation 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
61  
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 Forecast:** Moderate  
- **Cold & Flu Forecast:** Flu risk is very low in your area