Mystic, CT Weather & Growing Conditions
Tonight
52°F
Partly Cloudy
Partly cloudy, with a low around 52. Northeast wind 3 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Partly Cloudy | 3 to 10 mph NE | 0% |
| Saturday | 68°F | Mostly Sunny | 10 mph E | 0% |
| Saturday Night | 53°F | Mostly Cloudy | 8 mph SE | 0% |
| Sunday | 68°F | Showers And Thunderstorms | 6 to 12 mph SE | 79% |
| Sunday Night | 56°F | Showers And Thunderstorms | 5 to 10 mph E | 91% |
| Monday | 67°F | Rain Showers Likely | 9 to 13 mph NE | 60% |
| Monday Night | 51°F | Slight Chance Rain Showers | 6 to 12 mph NE | 23% |
| Tuesday | 64°F | Slight Chance Rain Showers | 14 mph NE | 20% |
| Tuesday Night | 50°F | Mostly Cloudy | 10 to 14 mph NE | 10% |
| Wednesday | 64°F | Partly Sunny then Slight Chance Rain Showers | 17 mph NE | 15% |
| Wednesday Night | 50°F | Chance Rain Showers | 12 to 16 mph NE | 26% |
| Thursday | 63°F | Chance Rain Showers | 17 mph NE | 32% |
| Thursday Night | 51°F | Chance Rain Showers | 9 to 14 mph NE | 38% |
| Friday | 66°F | Chance Rain Showers | 12 to 15 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mystic, CT
Last spring frost
Apr 8
First fall frost
Nov 2
Growing season
207 days
Hardiness zone
7a
Explore more for Mystic, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Groton, Ct (3.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.