Thomaston, CT Weather & Growing Conditions
Today
81°F
Sunny
Sunny, with a high near 81. West wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Sunny | 0 to 3 mph W | 0% |
| Tonight | 60°F | Partly Cloudy then Patchy Fog | 2 mph SW | 2% |
| Wednesday | 80°F | Patchy Fog then Partly Sunny | 0 to 5 mph SW | 8% |
| Wednesday Night | 66°F | Slight Chance Rain Showers | 0 to 3 mph S | 20% |
| Thursday | 84°F | Chance Showers And Thunderstorms | 0 to 7 mph SW | 64% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms then Isolated Showers And Thunderstorms | 1 to 5 mph SW | 64% |
| Friday | 85°F | Mostly Sunny then Scattered Showers And Thunderstorms | 1 to 6 mph SW | 49% |
| Friday Night | 67°F | Scattered Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 mph W | 49% |
| Saturday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph W | 40% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 3 mph W | 40% |
| Sunday | 85°F | Mostly Sunny | 2 to 7 mph W | 12% |
| Sunday Night | 67°F | Mostly Clear | 5 mph SW | 12% |
| Monday | 86°F | Sunny then Slight Chance Showers And Thunderstorms | 2 to 9 mph W | 19% |
| Monday Night | 65°F | Slight Chance Showers And Thunderstorms | 3 to 7 mph W | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Thomaston, CT
Last spring frost
Apr 25
First fall frost
Oct 18
Growing season
172 days
Hardiness zone
6a
Explore more for Thomaston, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Burlington, Ct (11.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.