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
68°F
Partly Sunny
Partly sunny, with a high near 68. East wind around 8 mph.
7-day forecast for New Canaan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Partly Sunny | 8 mph E | 0% |
| Tonight | 55°F | Partly Cloudy | 6 mph SE | 2% |
| Sunday | 67°F | Rain | 6 to 9 mph SE | 94% |
| Sunday Night | 53°F | Rain | 5 to 10 mph E | 94% |
| Monday | 67°F | Chance Light Rain then Partly Sunny | 8 to 13 mph NE | 26% |
| Monday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 12 mph NE | 20% |
| Tuesday | 63°F | Slight Chance Rain Showers | 13 mph NE | 24% |
| Tuesday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 12 to 15 mph NE | 23% |
| Wednesday | 64°F | Slight Chance Rain Showers | 17 mph NE | 16% |
| Wednesday Night | 49°F | Chance Rain Showers | 17 mph NE | 31% |
| Thursday | 63°F | Chance Rain Showers | 18 mph NE | 31% |
| Thursday Night | 49°F | Chance Rain Showers | 17 mph NE | 39% |
| Friday | 64°F | Chance Rain Showers | 16 mph N | 37% |
| Friday Night | 49°F | Chance Rain Showers | 17 mph N | 33% |
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 Sep 19, 2026.