Belfast, ME Weather & Growing Conditions
Overnight
43°F
Mostly Clear
Mostly clear, with a low around 43. Northwest wind around 5 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Mostly Clear | 5 mph NW | 0% |
| Saturday | 64°F | Sunny | 0 to 10 mph NW | 0% |
| Saturday Night | 43°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 62°F | Mostly Cloudy then Chance Rain Showers | 0 to 10 mph S | 29% |
| Sunday Night | 45°F | Chance Rain Showers | 0 to 5 mph W | 38% |
| Monday | 65°F | Mostly Sunny | 5 to 10 mph N | 7% |
| Monday Night | 42°F | Partly Cloudy | 5 mph N | 0% |
| Tuesday | 63°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Tuesday Night | 41°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 64°F | Sunny | 5 mph E | 1% |
| Wednesday Night | 42°F | Partly Cloudy | 0 to 5 mph E | 4% |
| Thursday | 64°F | Partly Sunny then Slight Chance Rain Showers | 0 to 5 mph NE | 15% |
| Thursday Night | 44°F | Chance Rain Showers | 0 to 5 mph NE | 26% |
| Friday | 66°F | Chance Rain Showers | 5 to 10 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Belfast, ME
Last spring frost
May 7
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5b
Explore more for Belfast, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Belfast, Me (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.