Grand Marais, MI Weather & Growing Conditions
Today
68°F
Partly Sunny
Partly sunny, with a high near 68. Southeast wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Partly Sunny | 5 to 10 mph SE | 4% |
| Tonight | 46°F | Mostly Cloudy | 0 to 5 mph E | 9% |
| Sunday | 62°F | Mostly Sunny | 10 to 15 mph NE | 4% |
| Sunday Night | 42°F | Partly Cloudy | 5 to 15 mph NE | 0% |
| Monday | 59°F | Partly Sunny | 5 to 10 mph NE | 0% |
| Monday Night | 40°F | Partly Cloudy | 5 to 10 mph E | 0% |
| Tuesday | 64°F | Sunny | 5 to 10 mph E | 0% |
| Tuesday Night | 41°F | Mostly Clear | 5 to 10 mph E | 0% |
| Wednesday | 67°F | Sunny | 5 to 10 mph E | 2% |
| Wednesday Night | 44°F | Mostly Clear | 5 mph E | 1% |
| Thursday | 68°F | Sunny | 5 mph E | 2% |
| Thursday Night | 45°F | Partly Cloudy | 0 to 5 mph E | 2% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph E | 2% |
| Friday Night | 46°F | Partly Cloudy | 0 to 5 mph SE | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grand Marais, MI
Last spring frost
May 27
First fall frost
Oct 10
Growing season
138 days
Hardiness zone
5b
Explore more for Grand Marais, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Grand Marais 2 E, Mi (10.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.