Belfast, ME Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belfast, a city in Waldo County, Maine.
Today
64°F
Sunny
Sunny, with a high near 64. North wind 0 to 10 mph.
7-day forecast for Belfast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Sunny | 0 to 10 mph N | 0% |
| Tonight | 43°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 62°F | Mostly Cloudy then Rain Showers Likely | 0 to 10 mph S | 55% |
| Sunday Night | 43°F | Light Rain Likely then Rain Showers Likely | 0 to 5 mph E | 64% |
| Monday | 64°F | Mostly Sunny | 5 to 10 mph N | 4% |
| Monday Night | 41°F | Partly Cloudy | 5 to 10 mph N | 0% |
| Tuesday | 63°F | Mostly Sunny | 5 to 10 mph N | 0% |
| Tuesday Night | 41°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Wednesday | 63°F | Sunny | 5 mph E | 0% |
| Wednesday Night | 41°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 63°F | Slight Chance Rain Showers | 0 to 5 mph NE | 19% |
| Thursday Night | 43°F | Chance Rain Showers | 0 to 15 mph NE | 30% |
| Friday | 64°F | Chance Rain Showers | 10 to 15 mph N | 29% |
| Friday Night | 45°F | Chance Rain Showers | 10 to 15 mph NE | 29% |
Forecast source: National Weather Service (api.weather.gov) for Belfast (44.426, -69.026). Updated through the day.
Growing snapshot for Belfast
Last spring frost
May 7
First fall frost
Oct 5
Growing season
151 days
Hardiness zone
5b
More local growing data for Belfast: nearby ZIP 04915 weather · frost dates · planting calendar · Maine frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Belfast, Me (5.3 mi from Belfast). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.