Thomaston, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thomaston, a community in Knox County, Maine.
Today
85°F
Sunny
Sunny, with a high near 85. West wind 10 to 15 mph, with gusts as high as 25 mph.
7-day forecast for Thomaston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 10 to 15 mph W | 0% |
| Tonight | 61°F | Mostly Clear | 0 to 10 mph W | 0% |
| Wednesday | 85°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 63°F | Partly Cloudy | 0 to 5 mph SW | 4% |
| Thursday | 86°F | Sunny | 0 to 10 mph SW | 4% |
| Thursday Night | 67°F | Partly Cloudy | 0 to 5 mph SW | 5% |
| Friday | 89°F | Mostly Sunny | 0 to 10 mph SW | 14% |
| Friday Night | 68°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 21% |
| Saturday | 85°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 10 mph W | 28% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 26% |
| Sunday | 84°F | Mostly Sunny | 0 to 10 mph W | 6% |
| Sunday Night | 66°F | Mostly Clear | 0 to 5 mph SW | 6% |
| Monday | 86°F | Mostly Sunny | 0 to 10 mph SW | 11% |
| Monday Night | 66°F | Slight Chance Rain Showers | 0 to 10 mph W | 19% |
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 Aug 4, 2026.