Collinsville, CT Weather & Growing Conditions
Today
83°F
Sunny
Sunny, with a high near 83. West wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 0 to 3 mph W | 0% |
| Tonight | 59°F | Partly Cloudy | 2 mph SW | 2% |
| Wednesday | 82°F | Mostly Sunny | 0 to 5 mph SW | 3% |
| Wednesday Night | 65°F | Partly Cloudy | 0 to 5 mph S | 14% |
| Thursday | 85°F | Chance Rain Showers | 0 to 8 mph SW | 43% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 54% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph SW | 34% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 1 to 5 mph W | 46% |
| Saturday | 85°F | Partly Sunny then Chance Rain Showers | 1 to 6 mph W | 31% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph SW | 41% |
| 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 W | 11% |
| Monday Night | 67°F | Mostly Clear | 7 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Collinsville, CT
Last spring frost
Apr 25
First fall frost
Oct 18
Growing season
172 days
Hardiness zone
6b
Explore more for Collinsville, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Burlington, Ct (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.