Thomaston, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thomaston, a community in Knox County, Maine.
This Afternoon
78°F
Sunny
Sunny, with a high near 78. Northwest wind around 10 mph, with gusts as high as 25 mph.
7-day forecast for Thomaston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 10 mph NW | 0% |
| Tonight | 45°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Saturday | 65°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 45°F | Partly Cloudy | 0 to 5 mph W | 0% |
| Sunday | 64°F | Mostly Cloudy then Chance Rain Showers | 0 to 10 mph S | 30% |
| Sunday Night | 46°F | Chance Rain Showers | 0 to 5 mph SW | 50% |
| Monday | 66°F | Mostly Sunny | 5 to 10 mph N | 10% |
| Monday Night | 44°F | Partly Cloudy | 5 to 10 mph N | 0% |
| Tuesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 0% |
| Tuesday Night | 45°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 64°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 45°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Thursday | 64°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph NE | 22% |
| Thursday Night | 46°F | Chance Rain Showers | 0 to 15 mph NE | 26% |
Forecast source: National Weather Service (api.weather.gov) for Thomaston (44.082, -69.179). Updated through the day.
Growing snapshot for Thomaston
Last spring frost
Apr 27
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
6a
More local growing data for Thomaston: nearby ZIP 04861 weather · frost dates · planting calendar · Maine frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, W Rockport 1 Nnw, Me (6 mi from Thomaston). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.