# Herndon Weather

**Location**  
Herndon, 20170, Virginia, United States  
·  
As of 9:22 PM GMT-4

### Current Conditions  
- **Temperature:** 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°         |

### Additional Information  
- **Wind:** 4 mph N  
- **Humidity:** 81%  
- **Air Quality Index:** 63 - Moderate  
- **Dew Point:** 71°  
- **Pressure:** 30.05 in  
- **UV Index:** 0 of 11  
- **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  
- **Index:** 63  
- **Health Concern:** 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:** Moderate in your area  
- **Flu Risk:** Very low in your area