Harman US

Colchester, CT Weather & Growing Conditions

Overnight
49°F
Mostly Cloudy
Mostly cloudy. Low around 49, with temperatures rising to around 52 overnight. North wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 49°F Mostly Cloudy 5 mph N 0%
Saturday 69°F Mostly Sunny 6 mph NE 0%
Saturday Night 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%

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.