Collinsville, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Collinsville, a community in Hartford County, Connecticut.
Overnight
51°F
Partly Cloudy
Partly cloudy, with a low around 51. Southwest wind around 3 mph.
7-day forecast for Collinsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Partly Cloudy | 3 mph SW | 2% |
| Wednesday | 73°F | Sunny | 2 to 9 mph SW | 2% |
| Wednesday Night | 55°F | Partly Cloudy | 6 mph S | 2% |
| Thursday | 70°F | Patchy Fog then Slight Chance Light Rain | 5 to 10 mph S | 24% |
| Thursday Night | 60°F | Light Rain Likely | 2 to 7 mph SW | 68% |
| Friday | 68°F | Light Rain | 3 mph S | 80% |
| Friday Night | 52°F | Light Rain | 2 mph NE | 78% |
| Saturday | 63°F | Slight Chance Light Rain | 6 mph NW | 23% |
| Saturday Night | 42°F | Chance Light Rain | 5 to 9 mph NW | 27% |
| Sunday | 58°F | Slight Chance Light Rain then Mostly Sunny | 6 to 9 mph NW | 17% |
| Sunday Night | 36°F | Partly Cloudy | 7 mph W | 7% |
| Monday | 55°F | Mostly Sunny | 7 to 13 mph W | 14% |
| Monday Night | 35°F | Partly Cloudy | 7 mph W | 11% |
| Tuesday | 58°F | Mostly Sunny | 7 to 10 mph W | 5% |
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
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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 Nov 4, 2026.