Belfast, ME Weather & Growing Conditions
Tonight
49°F
Light Rain Likely then Chance Rain Showers
Rain likely before 11pm, then a chance of rain showers between 11pm and 4am. Cloudy, with a low around 49. Southeast wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Light Rain Likely then Chance Rain Showers | 0 to 5 mph SE | 57% |
| Wednesday | 70°F | Partly Sunny | 0 to 5 mph SW | 10% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 5 mph S | 4% |
| Thursday | 69°F | Mostly Cloudy | 5 to 10 mph SW | 9% |
| Thursday Night | 57°F | Mostly Cloudy | 5 to 10 mph SW | 14% |
| Friday | 66°F | Light Rain Likely | 0 to 5 mph S | 56% |
| Friday Night | 50°F | Light Rain | 5 to 10 mph NE | 86% |
| Saturday | 57°F | Light Rain | 10 mph NE | 84% |
| Saturday Night | 44°F | Light Rain Likely | 5 to 10 mph N | 70% |
| Sunday | 55°F | Chance Light Rain | 5 to 10 mph NW | 53% |
| Sunday Night | 38°F | Chance Light Rain then Mostly Cloudy | 5 mph W | 29% |
| Monday | 52°F | Slight Chance Light Rain | 5 to 10 mph NW | 21% |
| Monday Night | 35°F | Slight Chance Light Rain | 5 to 10 mph NW | 23% |
| Tuesday | 51°F | Slight Chance Light Rain | 10 to 15 mph W | 22% |
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
5a
Explore more for Belfast, ME: full frost dates · planting calendar · Maine frost dates
Climate data from the nearest NOAA station, Belfast, Me (14.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.