Hamilton, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hamilton, a town in Loudoun County, Virginia.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Northeast wind 3 to 7 mph.
7-day forecast for Hamilton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 3 to 7 mph NE | 1% |
| Tonight | 68°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 1 to 7 mph E | 58% |
| Wednesday | 85°F | Rain Showers Likely | 2 to 8 mph E | 66% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 5 to 8 mph S | 49% |
| Thursday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 7 to 12 mph S | 35% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 3 to 10 mph SW | 35% |
| Friday | 89°F | Mostly Sunny then Showers And Thunderstorms Likely | 2 to 7 mph SW | 59% |
| Friday Night | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 6 mph SW | 59% |
| Saturday | 88°F | Partly Sunny then Showers And Thunderstorms Likely | 1 to 6 mph W | 56% |
| Saturday Night | 69°F | Showers And Thunderstorms Likely | 1 to 6 mph SW | 56% |
| Sunday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph W | 17% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 17% |
| Monday | 91°F | Mostly Sunny | 2 to 9 mph W | 11% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph W | 15% |
Forecast source: National Weather Service (api.weather.gov) for Hamilton (39.135, -77.664). Updated through the day.
Growing snapshot for Hamilton
Last spring frost
Apr 16
First fall frost
Oct 25
Growing season
189 days
Hardiness zone
7a
More local growing data for Hamilton: nearby ZIP 20158 weather · frost dates · planting calendar · Virginia frost dates
Nearby towns & communities
Aldie
Arcola
Ashburn
Belmont
Brambleton
Broadlands
Cascades
Countryside
Dulles Town Center
Goose Creek Village
Hillsboro
Kincora
Lansdowne
Leesburg
Loudoun Valley Estates
Lovettsville
Lowes Island
Middleburg
Moorefield
Oak Grove
One Loudoun
Purcellville
Round Hill
South Riding
Sterling
Stone Ridge
Sugarland Run
University Center
Upperville
Waterford
Climate data from the nearest NOAA station, Purcellville, Va (2.7 mi from Hamilton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.