Thomaston, CT Weather & Growing Conditions
This Afternoon
68°F
Mostly Cloudy
Mostly cloudy. High near 68, with temperatures falling to around 62 in the afternoon. Southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Mostly Cloudy | 6 mph SW | 2% |
| Tonight | 49°F | Partly Cloudy then Patchy Fog | 3 mph SW | 5% |
| Wednesday | 71°F | Patchy Fog then Sunny | 2 to 10 mph SW | 3% |
| Wednesday Night | 54°F | Mostly Cloudy | 2 to 7 mph SW | 4% |
| Thursday | 67°F | Chance Rain Showers | 6 to 10 mph SW | 49% |
| Thursday Night | 59°F | Rain Showers | 1 to 6 mph SW | 79% |
| Friday | 67°F | Rain Showers then Rain | 0 to 5 mph S | 80% |
| Friday Night | 53°F | Rain | 3 mph N | 80% |
| Saturday | 63°F | Chance Light Rain | 7 mph NW | 52% |
| Saturday Night | 41°F | Chance Light Rain | 7 mph NW | 25% |
| Sunday | 58°F | Slight Chance Light Rain then Mostly Sunny | 5 to 8 mph W | 22% |
| Sunday Night | 36°F | Partly Cloudy then Slight Chance Light Rain | 3 to 7 mph W | 15% |
| Monday | 56°F | Chance Light Rain | 7 to 13 mph NW | 27% |
| Monday Night | 35°F | Chance Light Rain | 9 mph W | 27% |
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 Nov 3, 2026.