Greenwich, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenwich, a community in Fairfield County, Connecticut.
Tonight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. North wind 7 to 12 mph.
7-day forecast for Greenwich
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Partly Cloudy | 7 to 12 mph N | 0% |
| Saturday | 69°F | Mostly Sunny | 7 to 12 mph E | 0% |
| Saturday Night | 59°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph SE | 17% |
| Sunday | 69°F | Showers And Thunderstorms | 5 to 12 mph SE | 87% |
| Sunday Night | 59°F | Showers And Thunderstorms | 2 to 12 mph SW | 87% |
| Monday | 67°F | Chance Rain Showers | 12 mph NE | 44% |
| Monday Night | 55°F | Chance Rain Showers | 9 to 15 mph NE | 27% |
| Tuesday | 63°F | Chance Rain Showers | 16 mph NE | 26% |
| Tuesday Night | 53°F | Chance Rain Showers then Mostly Cloudy | 15 to 18 mph NE | 26% |
| Wednesday | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 18 mph NE | 15% |
| Wednesday Night | 52°F | Chance Rain Showers | 20 mph NE | 32% |
| Thursday | 63°F | Chance Rain Showers | 15 to 18 mph NE | 32% |
| Thursday Night | 52°F | Chance Rain Showers | 16 mph NE | 35% |
| Friday | 67°F | Chance Rain Showers | 12 to 16 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Greenwich (41.028, -73.627). Updated through the day.
Growing snapshot for Greenwich
Last spring frost
Apr 12
First fall frost
Oct 31
Growing season
200 days
Hardiness zone
7a
More local growing data for Greenwich: nearby ZIP 06830 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
Ball Pond
Bethel
Bigelow Corners
Bogus Hill
Botsford
Branchville
Bridgeport
Brookfield Center
Candlewood Isle
Candlewood Knolls
Candlewood Lake Club
Candlewood Orchards
Candlewood Shores
Cannondale
Chimney Point
Coleytown
Compo
Cos Cob
Danbury
Daniels Farm
Darien Downtown
Dodgingtown
East Village
Fairfield University
Georgetown
Greens Farms
Hawleyville
Indian Field
Inglenook
Kellogg Point
Climate data from the nearest NOAA station, Westchester Co Ap, Ny (4.8 mi from Greenwich). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.