Colchester, CT Weather & Growing Conditions
Overnight
48°F
Mostly Cloudy
Mostly cloudy, with a low around 48. East wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Mostly Cloudy | 2 mph E | 9% |
| Sunday | 64°F | Rain Showers | 3 to 8 mph SE | 97% |
| Sunday Night | 54°F | Rain Showers | 1 to 10 mph NE | 87% |
| Monday | 67°F | Patchy Fog then Partly Sunny | 6 to 12 mph NE | 10% |
| Monday Night | 47°F | Mostly Cloudy | 6 mph NE | 4% |
| Tuesday | 64°F | Mostly Cloudy | 6 to 9 mph NE | 11% |
| Tuesday Night | 46°F | Mostly Cloudy | 6 to 10 mph NE | 3% |
| Wednesday | 65°F | Partly Sunny | 10 to 15 mph NE | 4% |
| Wednesday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 8 to 14 mph NE | 19% |
| Thursday | 65°F | Chance Rain Showers | 16 mph NE | 28% |
| Thursday Night | 47°F | Chance Rain Showers | 14 to 18 mph NE | 37% |
| Friday | 64°F | Chance Rain Showers | 15 to 18 mph N | 38% |
| Friday Night | 48°F | Chance Rain Showers | 15 to 18 mph N | 38% |
| Saturday | 67°F | Chance Rain Showers | 13 to 17 mph N | 31% |
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 Sep 20, 2026.