Colchester, CT Weather & Growing Conditions
Tonight
50°F
Partly Cloudy then Patchy Fog
Patchy fog after midnight. Partly cloudy, with a low around 50. Southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Partly Cloudy then Patchy Fog | 3 mph SW | 3% |
| Wednesday | 72°F | Sunny | 3 to 13 mph SW | 3% |
| Wednesday Night | 55°F | Partly Cloudy | 6 mph SW | 2% |
| Thursday | 70°F | Slight Chance Rain Showers | 5 to 12 mph SW | 20% |
| Thursday Night | 61°F | Rain Showers | 5 to 8 mph SW | 80% |
| Friday | 67°F | Showers And Thunderstorms | 6 mph S | 87% |
| Friday Night | 56°F | Showers And Thunderstorms | 5 mph SW | 87% |
| Saturday | 65°F | Rain Showers Likely | 7 mph NW | 64% |
| Saturday Night | 42°F | Chance Rain Showers | 6 mph NW | 34% |
| Sunday | 59°F | Slight Chance Rain Showers then Mostly Sunny | 3 to 8 mph W | 20% |
| Sunday Night | 36°F | Partly Cloudy then Slight Chance Light Rain | 6 mph W | 15% |
| Monday | 58°F | Chance Light Rain | 6 to 14 mph NW | 25% |
| Monday Night | 35°F | Chance Light Rain | 6 to 9 mph W | 26% |
| Tuesday | 58°F | Chance Light Rain then Mostly Sunny | 9 to 14 mph SW | 26% |
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 Nov 4, 2026.