Thomaston, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thomaston, a community in Knox County, Maine.
Overnight
48°F
Mostly Cloudy
Mostly cloudy, with a low around 48. Wind around 0 mph.
7-day forecast for Thomaston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Mostly Cloudy | 0 mph | 5% |
| Wednesday | 68°F | Partly Sunny | 0 to 10 mph SW | 4% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph SW | 3% |
| Thursday | 66°F | Mostly Cloudy then Slight Chance Light Rain | 5 to 15 mph SW | 20% |
| Thursday Night | 55°F | Chance Light Rain | 5 to 10 mph SW | 29% |
| Friday | 67°F | Light Rain Likely | 0 to 5 mph S | 63% |
| Friday Night | 50°F | Light Rain | 0 to 5 mph E | 94% |
| Saturday | 60°F | Light Rain | 5 to 10 mph E | 89% |
| Saturday Night | 43°F | Chance Light Rain | 5 mph NE | 51% |
| Sunday | 55°F | Chance Light Rain | 5 to 10 mph NW | 44% |
| Sunday Night | 36°F | Slight Chance Light Rain then Partly Cloudy | 0 to 5 mph W | 17% |
| Monday | 53°F | Chance Light Rain | 5 to 15 mph W | 25% |
| Monday Night | 32°F | Slight Chance Light Rain then Partly Cloudy | 5 mph W | 23% |
| Tuesday | 53°F | Mostly Sunny | 5 to 15 mph W | 11% |
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 Nov 4, 2026.