Herndon, VA Weather & Growing Conditions
This Afternoon
71°F
Sunny
Sunny, with a high near 71. South wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Sunny | 8 mph S | 2% |
| Tonight | 52°F | Mostly Clear | 7 mph S | 2% |
| Wednesday | 74°F | Mostly Sunny | 5 to 10 mph S | 2% |
| Wednesday Night | 62°F | Mostly Cloudy then Chance Light Rain | 9 mph S | 50% |
| Thursday | 75°F | Chance Light Rain | 10 mph S | 43% |
| Thursday Night | 61°F | Chance Light Rain | 2 to 7 mph SW | 49% |
| Friday | 70°F | Rain Likely | 5 mph NW | 61% |
| Friday Night | 50°F | Light Rain Likely then Mostly Cloudy | 2 to 6 mph NW | 61% |
| Saturday | 64°F | Mostly Sunny | 7 to 12 mph NW | 10% |
| Saturday Night | 43°F | Partly Cloudy | 8 mph NW | 10% |
| Sunday | 61°F | Mostly Sunny | 5 to 8 mph NW | 6% |
| Sunday Night | 43°F | Partly Cloudy | 7 mph NW | 14% |
| Monday | 61°F | Mostly Sunny | 7 to 12 mph NW | 14% |
| Monday Night | 40°F | Mostly Clear | 3 to 7 mph W | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Herndon, VA
Last spring frost
Apr 15
First fall frost
Oct 24
Growing season
194 days
Hardiness zone
7b
Explore more for Herndon, VA: full frost dates · planting calendar · Virginia frost dates
Climate data from the nearest NOAA station, Washington Dc Dulles Ap, Va (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.