Crystal Lake, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Crystal Lake, a community in Tolland County, Connecticut.
Tonight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. North wind 7 to 10 mph.
7-day forecast for Crystal Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Partly Cloudy | 7 to 10 mph N | 0% |
| Saturday | 66°F | Mostly Sunny | 1 to 7 mph NE | 0% |
| Saturday Night | 47°F | Partly Cloudy | 5 mph SE | 3% |
| Sunday | 63°F | Rain Showers | 7 mph SE | 90% |
| Sunday Night | 54°F | Rain Showers | 6 to 12 mph E | 89% |
| Monday | 64°F | Slight Chance Rain Showers | 8 to 12 mph NE | 22% |
| Monday Night | 48°F | Partly Cloudy | 7 to 12 mph NE | 12% |
| Tuesday | 60°F | Mostly Cloudy | 12 mph NE | 14% |
| Tuesday Night | 46°F | Mostly Cloudy | 10 to 14 mph NE | 6% |
| Wednesday | 61°F | Partly Sunny | 16 mph NE | 10% |
| Wednesday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 12 to 15 mph NE | 23% |
| Thursday | 60°F | Chance Rain Showers | 15 mph NE | 27% |
| Thursday Night | 47°F | Chance Rain Showers | 14 mph NE | 32% |
| Friday | 63°F | Chance Rain Showers | 14 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov) for Crystal Lake (41.933, -72.381). Updated through the day.
Growing snapshot for Crystal Lake
Last spring frost
Apr 19
First fall frost
Oct 22
Growing season
186 days
Hardiness zone
6b
More local growing data for Crystal Lake: nearby ZIP 06084 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Storrs, Ct (9.1 mi from Crystal Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.