Colchester, CT Weather & Growing Conditions
Today
83°F
Sunny
Sunny, with a high near 83. West wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 3 mph W | 0% |
| Tonight | 60°F | Partly Cloudy | 0 to 3 mph S | 5% |
| Wednesday | 82°F | Mostly Sunny | 0 to 5 mph SW | 6% |
| Wednesday Night | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 1 to 5 mph S | 16% |
| Thursday | 85°F | Chance Rain Showers | 1 to 8 mph SW | 27% |
| Thursday Night | 71°F | Chance Rain Showers | 2 to 7 mph SW | 32% |
| Friday | 87°F | Mostly Sunny then Chance Rain Showers | 2 to 8 mph SW | 27% |
| Friday Night | 69°F | Chance Rain Showers | 0 to 6 mph W | 36% |
| Saturday | 86°F | Mostly Sunny then Chance Rain Showers | 0 to 6 mph W | 34% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 46% |
| Sunday | 86°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 6 mph W | 17% |
| Sunday Night | 68°F | Slight Chance Rain Showers then Partly Cloudy | 1 to 5 mph SW | 21% |
| Monday | 87°F | Sunny | 1 to 9 mph SW | 10% |
| Monday Night | 68°F | Partly Cloudy | 3 to 7 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Colchester, CT
Last spring frost
Apr 28
First fall frost
Oct 13
Growing season
167 days
Hardiness zone
6b
Explore more for Colchester, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Willimantic Windham Ap, Ct (12.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.