Mystic, CT Weather & Growing Conditions
Tonight
52°F
Partly Cloudy then Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 52. Southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Partly Cloudy then Patchy Fog | 3 mph SW | 3% |
| Wednesday | 70°F | Sunny | 3 to 12 mph SW | 4% |
| Wednesday Night | 57°F | Partly Cloudy | 6 mph SW | 2% |
| Thursday | 71°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 10 mph SW | 17% |
| Thursday Night | 61°F | Rain Showers | 7 mph SW | 82% |
| Friday | 68°F | Showers And Thunderstorms | 5 to 8 mph S | 92% |
| Friday Night | 56°F | Showers And Thunderstorms | 5 mph SW | 92% |
| Saturday | 66°F | Rain Showers Likely | 5 to 8 mph NW | 73% |
| Saturday Night | 43°F | Chance Rain Showers | 6 mph NW | 37% |
| Sunday | 61°F | Slight Chance Rain Showers then Mostly Sunny | 6 to 9 mph W | 20% |
| Sunday Night | 39°F | Partly Cloudy then Slight Chance Light Rain | 3 to 7 mph W | 16% |
| Monday | 60°F | Chance Light Rain | 7 to 13 mph NW | 29% |
| Monday Night | 37°F | Chance Light Rain | 9 mph W | 29% |
| Tuesday | 59°F | Chance Light Rain | 10 to 14 mph W | 28% |
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 Nov 4, 2026.