Collinsville, CT Weather & Growing Conditions
Tonight
50°F
Partly Cloudy
Partly cloudy, with a low around 50. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Partly Cloudy | 5 mph S | 3% |
| Wednesday | 74°F | Sunny | 5 to 9 mph SW | 3% |
| Wednesday Night | 55°F | Partly Cloudy | 6 mph SW | 2% |
| Thursday | 71°F | Chance Light Rain | 5 to 10 mph S | 44% |
| Thursday Night | 61°F | Light Rain Likely | 2 to 8 mph S | 73% |
| Friday | 68°F | Rain | 1 to 5 mph S | 80% |
| Friday Night | 54°F | Rain | 5 mph NW | 78% |
| Saturday | 64°F | Light Rain Likely | 7 mph NW | 55% |
| Saturday Night | 41°F | Chance Light Rain | 7 mph NW | 30% |
| Sunday | 59°F | Slight Chance Light Rain then Mostly Sunny | 5 to 9 mph W | 20% |
| Sunday Night | 36°F | Partly Cloudy | 6 mph W | 8% |
| Monday | 57°F | Slight Chance Light Rain | 6 to 14 mph NW | 20% |
| Monday Night | 35°F | Slight Chance Light Rain then Partly Cloudy | 8 mph W | 19% |
| Tuesday | 58°F | Mostly Sunny | 9 to 14 mph W | 9% |
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 Nov 4, 2026.