Colchester, CT Weather & Growing Conditions
This Afternoon
69°F
Mostly Sunny
Mostly sunny. High near 69, with temperatures falling to around 66 in the afternoon. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Mostly Sunny | 5 mph E | 0% |
| Tonight | 49°F | Mostly Cloudy | 3 mph E | 0% |
| Sunday | 64°F | Rain | 1 to 6 mph SE | 94% |
| Sunday Night | 51°F | Rain | 3 to 8 mph NE | 94% |
| Monday | 66°F | Chance Light Rain then Partly Sunny | 5 to 10 mph N | 26% |
| Monday Night | 46°F | Mostly Cloudy | 3 to 7 mph NE | 4% |
| Tuesday | 62°F | Mostly Cloudy | 10 mph NE | 6% |
| Tuesday Night | 45°F | Mostly Cloudy | 7 to 10 mph NE | 4% |
| Wednesday | 64°F | Partly Sunny | 12 to 16 mph NE | 4% |
| Wednesday Night | 46°F | Mostly Cloudy then Chance Rain Showers | 12 to 16 mph NE | 25% |
| Thursday | 63°F | Chance Rain Showers | 15 to 18 mph NE | 32% |
| Thursday Night | 47°F | Chance Rain Showers | 16 mph N | 36% |
| Friday | 63°F | Chance Rain Showers | 14 to 17 mph N | 33% |
| Friday Night | 47°F | Chance Rain Showers | 13 to 17 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Colchester, CT
Last spring frost
Apr 14
First fall frost
Oct 24
Growing season
192 days
Hardiness zone
6b
Explore more for Colchester, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Norwich Public Utility Plt, Ct (14.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.