South Run, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Run, a community in Fairfax County, Virginia.
Tonight
68°F
Mostly Cloudy
Mostly cloudy, with a low around 68. Southeast wind around 8 mph.
7-day forecast for South Run
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Mostly Cloudy | 8 mph SE | 10% |
| Sunday | 85°F | Chance Rain Showers | 7 to 12 mph S | 29% |
| Sunday Night | 64°F | Showers And Thunderstorms Likely | 2 to 8 mph W | 56% |
| Monday | 74°F | Chance Rain Showers | 8 to 12 mph NE | 44% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 7 to 10 mph NE | 47% |
| Tuesday | 68°F | Showers And Thunderstorms Likely | 8 to 13 mph NE | 55% |
| Tuesday Night | 58°F | Showers And Thunderstorms Likely | 12 mph NE | 55% |
| Wednesday | 64°F | Chance Rain Showers | 13 mph NE | 50% |
| Wednesday Night | 57°F | Chance Rain Showers | 13 mph NE | 36% |
| Thursday | 64°F | Chance Rain Showers | 13 mph NE | 31% |
| Thursday Night | 54°F | Chance Rain Showers | 7 to 12 mph N | 25% |
| Friday | 68°F | Slight Chance Rain Showers | 13 mph N | 23% |
| Friday Night | 54°F | Slight Chance Rain Showers | 7 to 12 mph N | 19% |
| Saturday | 71°F | Slight Chance Rain Showers | 13 mph N | 15% |
Forecast source: National Weather Service (api.weather.gov) for South Run (38.748, -77.273). Updated through the day.
Growing snapshot for South Run
Last spring frost
Apr 14
First fall frost
Oct 29
Growing season
198 days
Hardiness zone
7b
More local growing data for South Run: nearby ZIP 22153 weather · frost dates · planting calendar · Virginia frost dates
Nearby towns & communities
Annandale
Bailey's Crossroads
Belle Haven
Braddock
Bull Run
Burke
Burke Centre
Centreville
Chantilly
Clifton
Crosspointe
Difficult Run
Dranesville
Dunn Loring
Fair Lakes
Fair Oaks
Fairfax
Fairfax Station
Floris
Fort Belvoir
Fort Hunt
Franconia
Franklin Farm
George Mason
Great Falls
Great Falls Crossing
Greenbriar
Groveton
Hayfield
Herndon
Climate data from the nearest NOAA station, Vienna, Va (10.6 mi from South Run). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.