New Canaan, CT Weather & Growing Conditions
Tonight
55°F
Mostly Cloudy
Mostly cloudy. Low around 55, with temperatures rising to around 57 overnight. Southeast wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Cloudy | 6 mph SE | 4% |
| Sunday | 68°F | Rain Showers then Rain | 6 to 10 mph SE | 95% |
| Sunday Night | 55°F | Rain then Rain Showers | 5 to 13 mph E | 86% |
| Monday | 68°F | Slight Chance Rain Showers then Partly Sunny | 7 to 13 mph NE | 17% |
| Monday Night | 50°F | Mostly Cloudy then Chance Rain Showers | 6 to 10 mph NE | 25% |
| Tuesday | 63°F | Chance Rain Showers | 12 mph NE | 25% |
| Tuesday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 9 to 14 mph NE | 20% |
| Wednesday | 64°F | Mostly Cloudy | 13 to 16 mph NE | 6% |
| Wednesday Night | 49°F | Slight Chance Rain Showers | 16 mph NE | 20% |
| Thursday | 63°F | Chance Rain Showers | 13 to 16 mph NE | 28% |
| Thursday Night | 49°F | Chance Rain Showers | 14 to 18 mph NE | 36% |
| Friday | 64°F | Chance Rain Showers | 14 to 18 mph N | 40% |
| Friday Night | 51°F | Chance Rain Showers | 15 to 18 mph N | 38% |
| Saturday | 67°F | Chance Rain Showers | 13 to 18 mph N | 27% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for New Canaan, CT
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
7a
Explore more for New Canaan, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Stamford 5 N, Ct (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.