Winthrop, ME Weather & Growing Conditions
Tonight
43°F
Partly Cloudy
Partly cloudy, with a low around 43. South wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 60°F | Mostly Cloudy then Light Rain | 0 to 10 mph S | 77% |
| Sunday Night | 44°F | Light Rain Likely | 0 to 5 mph E | 68% |
| Monday | 66°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Monday Night | 41°F | Partly Cloudy | 5 mph N | 0% |
| Tuesday | 63°F | Mostly Sunny | 5 mph NE | 0% |
| Tuesday Night | 42°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Wednesday | 64°F | Sunny | 5 mph NE | 0% |
| Wednesday Night | 41°F | Mostly Clear | 0 to 5 mph E | 0% |
| Thursday | 65°F | Mostly Sunny then Slight Chance Rain Showers | 5 mph NE | 15% |
| Thursday Night | 43°F | Slight Chance Rain Showers | 0 to 10 mph NE | 19% |
| Friday | 64°F | Chance Rain Showers | 10 mph NE | 34% |
| Friday Night | 46°F | Chance Rain Showers | 10 to 15 mph NE | 39% |
| Saturday | 64°F | Chance Rain Showers | 10 to 15 mph N | 38% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winthrop, ME
Last spring frost
May 1
First fall frost
Oct 11
Growing season
163 days
Hardiness zone
5b
Explore more for Winthrop, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Gardiner, Me (11.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.