Dumbarton, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dumbarton, a community in Henrico County, Virginia.
Overnight
69°F
Slight Chance Rain Showers
A slight chance of rain showers before 5am. Mostly cloudy, with a low around 69. Northeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Dumbarton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Slight Chance Rain Showers | 5 mph NE | 22% |
| Tuesday | 84°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 7 mph NE | 55% |
| Tuesday Night | 70°F | Showers And Thunderstorms | 1 to 6 mph E | 77% |
| Wednesday | 88°F | Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 8 mph S | 50% |
| Wednesday Night | 72°F | Partly Cloudy | 7 mph S | 12% |
| Thursday | 91°F | Mostly Sunny | 6 to 12 mph SW | 11% |
| Thursday Night | 73°F | Mostly Clear | 5 to 10 mph SW | 11% |
| Friday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 7 to 12 mph SW | 17% |
| Friday Night | 72°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 20% |
| Saturday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 6 to 10 mph SW | 28% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 3 to 9 mph SW | 28% |
| Sunday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 mph SW | 22% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 22% |
| Monday | 93°F | Mostly Sunny | 2 to 7 mph SW | 9% |
Forecast source: National Weather Service (api.weather.gov) for Dumbarton (37.612, -77.508). Updated through the day.
Growing snapshot for Dumbarton
Last spring frost
Apr 10
First fall frost
Oct 31
Growing season
202 days
Hardiness zone
7b
More local growing data for Dumbarton: nearby ZIP 23228 weather · frost dates · planting calendar · Virginia frost dates
Nearby towns & communities
Chamberlayne
East Highland Park
Glen Allen
Highland Springs
Innsbrook
Lakeside
Laurel
Montrose
Sandston
Short Pump
Tuckahoe
Climate data from the nearest NOAA station, Ashland Hanover Co Muni Ap, Va (6.5 mi from Dumbarton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.