New Canaan, CT Weather & Growing Conditions
This Afternoon
72°F
Sunny
Sunny. High near 72, with temperatures falling to around 64 in the afternoon. South wind 5 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Sunny | 5 to 8 mph S | 0% |
| Tonight | 55°F | Partly Cloudy | 5 mph S | 0% |
| Thursday | 70°F | Mostly Cloudy | 5 to 10 mph S | 14% |
| Thursday Night | 59°F | Rain Showers Likely | 3 to 7 mph S | 69% |
| Friday | 68°F | Rain Showers | 5 mph SE | 87% |
| Friday Night | 52°F | Rain Showers Likely | 3 mph N | 73% |
| Saturday | 64°F | Mostly Sunny then Slight Chance Rain Showers | 7 mph NW | 15% |
| Saturday Night | 43°F | Slight Chance Light Rain | 9 mph W | 24% |
| Sunday | 58°F | Slight Chance Light Rain then Mostly Sunny | 9 mph NW | 15% |
| Sunday Night | 39°F | Partly Cloudy | 8 mph W | 3% |
| Monday | 57°F | Sunny | 9 to 13 mph W | 12% |
| Monday Night | 37°F | Mostly Clear | 8 mph W | 12% |
| Tuesday | 60°F | Sunny | 8 to 12 mph W | 4% |
| Tuesday Night | 38°F | Mostly Clear | 9 mph W | 1% |
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 Nov 4, 2026.