Grand Marais, MI Weather & Growing Conditions
Overnight
38°F
Partly Cloudy
Partly cloudy, with a low around 38. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 38°F | Partly Cloudy | 5 mph E | 0% |
| Saturday | 68°F | Partly Sunny | 5 to 10 mph SE | 6% |
| Saturday Night | 43°F | Mostly Cloudy | 0 to 5 mph E | 12% |
| Sunday | 64°F | Mostly Sunny | 5 to 15 mph N | 1% |
| Sunday Night | 38°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 61°F | Partly Sunny | 5 to 10 mph NE | 0% |
| Monday Night | 35°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Tuesday | 66°F | Sunny | 0 to 5 mph E | 0% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 5 mph E | 0% |
| Wednesday | 68°F | Sunny | 5 mph E | 2% |
| Wednesday Night | 40°F | Mostly Clear | 0 to 5 mph E | 2% |
| Thursday | 69°F | Mostly Sunny | 0 to 5 mph E | 2% |
| Thursday Night | 41°F | Partly Cloudy | 0 to 5 mph E | 2% |
| Friday | 72°F | Mostly Sunny | 0 to 5 mph E | 2% |
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
5a
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 (17.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.