Crystal Lake, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Crystal Lake, a community in Tolland County, Connecticut.
Today
81°F
Sunny
Sunny, with a high near 81. West wind around 5 mph.
7-day forecast for Crystal Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Sunny | 5 mph W | 0% |
| Tonight | 59°F | Partly Cloudy | 5 mph SW | 2% |
| Wednesday | 81°F | Mostly Sunny | 1 to 6 mph W | 3% |
| Wednesday Night | 65°F | Partly Cloudy | 6 mph S | 12% |
| Thursday | 84°F | Chance Rain Showers | 5 to 9 mph SW | 44% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 8 mph SW | 54% |
| Friday | 85°F | Mostly Sunny then Chance Rain Showers | 8 mph SW | 34% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 46% |
| Saturday | 83°F | Mostly Sunny then Chance Rain Showers | 3 to 7 mph W | 31% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 6 mph SW | 42% |
| Sunday | 84°F | Mostly Sunny then Slight Chance Rain Showers | 3 to 8 mph W | 15% |
| Sunday Night | 67°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 8 mph SW | 19% |
| Monday | 85°F | Sunny | 3 to 10 mph SW | 13% |
| Monday Night | 66°F | Partly Cloudy | 9 mph W | 15% |
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 Aug 4, 2026.