# Herndon Weather

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

[Now79°78°77°  
Mostly Cloudy Night  
Mostly Cloudy  
Feels Like  
77°  
HHigh  
83°  
LLow  
68°  
Chance of Rain  
7%  
0 in](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour/index.html)

## Today's outlook  
Tonight's low temperature will be a little cooler than last night's.

| 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°         |

[Now  
Mostly Cloudy Night  
77°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786756920/index.html)  
[22:00  
Partly Cloudy Night  
76°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786759200/index.html)  
[23:00  
Partly Cloudy Night  
75°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786762800/index.html)  
[00:00  
Partly Cloudy Night  
74°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786766400/index.html)  
[01:00  
Partly Cloudy Night  
72°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786770000/index.html)  
[02:00  
Partly Cloudy Night  
72°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786773600/index.html)  
[03:00  
Partly Cloudy Night  
71°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786777200/index.html)  
[04:00  
Partly Cloudy Night  
70°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786780800/index.html)  
[05:00  
Mostly Clear Night  
70°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786784400/index.html)  
[06:00  
Partly Cloudy Night  
69°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786788000/index.html)  
[07:00  
Partly Cloudy Day  
69°](/content/en-VC/us/virginia/herndon/postcode/20170/hourbyhour?t=1786791600/index.html)

### Wind  
**Wind**: 4 mph N  
**Humidity**: 81%  
**Air Quality**: 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  
**Level**: 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.