Collinsville, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Collinsville, a community in Hartford County, Connecticut.
Today
82°F
Sunny
Sunny, with a high near 82. West wind around 3 mph.
7-day forecast for Collinsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 3 mph W | 0% |
| Tonight | 60°F | Partly Cloudy | 2 mph W | 2% |
| Wednesday | 81°F | Mostly Sunny | 0 to 5 mph SW | 3% |
| Wednesday Night | 65°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph S | 15% |
| Thursday | 84°F | Chance Rain Showers | 1 to 7 mph SW | 43% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 54% |
| Friday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph SW | 36% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 1 to 5 mph W | 49% |
| Saturday | 85°F | Partly Sunny then Chance Rain Showers | 1 to 6 mph W | 32% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Mostly Cloudy | 1 to 5 mph W | 41% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Rain Showers | 1 to 6 mph W | 16% |
| Sunday Night | 68°F | Slight Chance Rain Showers then Partly Cloudy | 5 mph SW | 20% |
| Monday | 87°F | Sunny | 2 to 8 mph W | 11% |
| Monday Night | 67°F | Partly Cloudy | 8 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov) for Collinsville (41.822, -72.924). Updated through the day.
Growing snapshot for Collinsville
Last spring frost
Apr 25
First fall frost
Oct 18
Growing season
172 days
Hardiness zone
6a
More local growing data for Collinsville: nearby ZIP 06019 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
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Climate data from the nearest NOAA station, Burlington, Ct (4.6 mi from Collinsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.