Weather forecast and conditions for Herndon, 20170, Virginia, United States - The Weather Channel | weather.com
Herndon Weather
Location
Herndon, 20170, Virginia, United States
As of 9:22 pm GMT-4
Now 79° / 78° / 77°
Mostly Cloudy Night
Feels Like 77°
High 83°
Low 68°
Chance of Rain 7%
0 in
Today's outlook
Tonight's low temperature will be a little cooler than last night's.
Hourly Forecast
| Time | Weather | 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: 63 - 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 | Weather | Probability | High | Low |
|---|---|---|---|---|
| Tonight | Partly Cloudy | 8% | 83° | 68° |
| Sat 15 | Mostly Clear | 7% | 87° | 73° |
| Sun 16 | Thunderstorms | 81% | 78° | 73° |
| Mon 17 | Partly Cloudy | 23% | 89° | 68° |
| Tue 18 | Mostly Clear | 5% | 85° | 65° |
| Wed 19 | Mostly Clear | 7% | 88° | 71° |
| Thu 20 | Scattered Thunderstorms | 52% | 87° | 66° |
Air Quality Index
Index: 63
Status: 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: Seasonal Allergies and Pollen Count Forecast - Grass pollen is moderate in your area.
- Flu: Cold & Flu Forecast - Flu risk is very low in your area.