New Canaan, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Canaan, a community in Fairfield County, Connecticut.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Northeast wind around 3 mph.
7-day forecast for New Canaan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 3 mph NE | 0% |
| Tonight | 63°F | Mostly Cloudy | 3 mph NW | 2% |
| Wednesday | 82°F | Partly Sunny then Slight Chance Rain Showers | 2 to 6 mph SE | 18% |
| Wednesday Night | 69°F | Chance Rain Showers | 5 mph S | 27% |
| Thursday | 88°F | Chance Showers And Thunderstorms | 2 to 8 mph SW | 43% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 to 7 mph SW | 40% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 7 mph SW | 40% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 5 mph SW | 39% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph W | 33% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 2 to 6 mph W | 33% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph W | 15% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 6 mph W | 15% |
| Monday | 89°F | Sunny | 3 to 9 mph W | 14% |
| Monday Night | 69°F | Slight Chance Rain Showers | 5 to 8 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for New Canaan (41.142, -73.490). Updated through the day.
Growing snapshot for New Canaan
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
7a
More local growing data for New Canaan: nearby ZIP 06840 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
Greenwich
Hawleyville
Indian Field
Inglenook
Climate data from the nearest NOAA station, Stamford 5 N, Ct (3.5 mi from New Canaan). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.