# Herndon Weather

## Location
Herndon, 20170, Virginia, United States  
As of 9:02 PM EDT

[Now79°78°77°\
\
Cloudy\
\
Cloudy\
\
Feels Like\
\
77°\
\
HHigh\
\
85°\
\
LLow\
\
69°\
\
Chance of Rain\
\
8%\
\
0 in](/content/en-PH/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  | 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°         |

[Node](/content/en-PH/us/virginia/herndon/postcode/20170/hourbyhour?t=1786755720/index.html)  
**Wind:** 4 mph NNE  
**Humidity:** 81%  
**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    | Condition              | Chance of Rain | 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:** 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