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 9:20 pm GMT-4
Now
79°
- 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 | 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: 4 mph N
Humidity
- Humidity: 81%
Air Quality
- Air Quality Index: 40 - Good
Dew Point
- Dew Point: 71°
Pressure
- Pressure: 30.05 in
UV Index
- UV Index: 0 of 11
Visibility
- Visibility: 10 mi
Moon Phase
- Waxing Crescent
Daily Forecast
| Date | Condition | Chance of Rain | Low | High |
|---|---|---|---|---|
| Tonight | Partly Cloudy Night | 8% | 68° | 83° |
| Sat 15 | Mostly Clear Day | 7% | 73° | 87° |
| Sun 16 | Thunderstorms | 81% | 73° | 78° |
| Mon 17 | Partly Cloudy Day | 23% | 68° | 89° |
| Tue 18 | Mostly Clear Day | 5% | 65° | 85° |
| Wed 19 | Mostly Clear Day | 7% | 71° | 88° |
| Thu 20 | Scattered Thunderstorms | 52% | 66° | 87° |
Air Quality Index
- 40
- Good
- Minimal impact.
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