Grand Marais, MI Weather & Growing Conditions
This Afternoon
64°F
Chance Rain Showers
A chance of rain showers before 5pm. Partly sunny. High near 64, with temperatures falling to around 61 in the afternoon. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Chance Rain Showers | 10 mph S | 25% |
| Tonight | 49°F | Cloudy then Chance Rain Showers | 5 to 10 mph S | 40% |
| Thursday | 52°F | Rain Showers | 10 to 20 mph NW | 90% |
| Thursday Night | 31°F | Rain And Snow Showers Likely | 15 to 20 mph N | 68% |
| Friday | 41°F | Chance Rain And Snow Showers | 10 to 15 mph N | 37% |
| Friday Night | 26°F | Slight Chance Rain Showers then Mostly Cloudy | 0 to 10 mph N | 17% |
| Saturday | 47°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 28°F | Partly Cloudy | 0 to 5 mph SW | 2% |
| Sunday | 50°F | Slight Chance Rain Showers | 5 to 15 mph W | 20% |
| Sunday Night | 32°F | Slight Chance Rain Showers | 0 to 10 mph NW | 20% |
| Monday | 54°F | Partly Sunny | 0 to 10 mph SW | 2% |
| Monday Night | 37°F | Mostly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 51°F | Partly Sunny then Slight Chance Rain Showers | 5 to 15 mph NW | 15% |
| Tuesday Night | 31°F | Slight Chance Rain Showers | 0 to 10 mph NW | 15% |
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 Nov 4, 2026.