Mystic, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mystic, a community in New London County, Connecticut.
This Afternoon
67°F
Mostly Cloudy
Mostly cloudy. High near 67, with temperatures falling to around 62 in the afternoon. Southwest wind around 6 mph.
7-day forecast for Mystic
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Cloudy | 6 mph SW | 0% |
| Tonight | 53°F | Patchy Fog | 5 mph SW | 3% |
| Wednesday | 69°F | Patchy Fog then Sunny | 3 to 12 mph SW | 4% |
| Wednesday Night | 57°F | Partly Cloudy | 6 mph SW | 2% |
| Thursday | 70°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph SW | 17% |
| Thursday Night | 61°F | Rain Showers | 8 mph SW | 82% |
| Friday | 67°F | Showers And Thunderstorms | 5 to 8 mph S | 93% |
| Friday Night | 57°F | Showers And Thunderstorms | 5 mph SW | 93% |
| Saturday | 65°F | Rain Showers Likely | 6 to 9 mph NW | 73% |
| Saturday Night | 44°F | Chance Rain Showers | 8 mph NW | 37% |
| Sunday | 61°F | Slight Chance Rain Showers then Mostly Sunny | 9 mph W | 20% |
| Sunday Night | 40°F | Partly Cloudy then Slight Chance Light Rain | 5 to 8 mph W | 16% |
| Monday | 59°F | Chance Light Rain | 8 to 14 mph NW | 30% |
| Monday Night | 40°F | Chance Light Rain | 12 mph W | 30% |
Forecast source: National Weather Service (api.weather.gov) for Mystic (41.356, -71.956). Updated through the day.
Growing snapshot for Mystic
Last spring frost
Apr 8
First fall frost
Nov 2
Growing season
207 days
Hardiness zone
7a
More local growing data for Mystic: nearby ZIP 06355 weather · frost dates · planting calendar · Connecticut frost dates
Nearby towns & communities
Baltic
Colchester
Conning Towers-Nautilus Park
Gales Ferry
Groton
Groton Long Point
Jewett City
Long Hill
Mashantucket
New London
Niantic
Noank
Norwich
Old Mystic
Oxoboxo River
Pawcatuck
Poquonock Bridge
Stonington
Waterford
Climate data from the nearest NOAA station, Groton, Ct (3.6 mi from Mystic). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.