Grand Marais, MI Weather & Growing Conditions
Today
64°F
Rain Showers
Rain showers and patchy fog. Mostly cloudy. High near 64, with temperatures falling to around 60 in the afternoon. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Rain Showers | 10 to 15 mph S | 86% |
| Tonight | 47°F | Chance Rain Showers | 10 mph S | 36% |
| Thursday | 52°F | Rain Showers | 5 to 20 mph W | 97% |
| Thursday Night | 29°F | Rain Showers then Chance Rain And Snow Showers | 15 to 20 mph N | 97% |
| Friday | 42°F | Chance Rain And Snow Showers | 10 to 15 mph N | 41% |
| Friday Night | 28°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 10 mph N | 19% |
| Saturday | 44°F | Mostly Sunny | 5 mph NW | 0% |
| Saturday Night | 29°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph W | 15% |
| Sunday | 47°F | Slight Chance Rain Showers | 5 to 15 mph W | 23% |
| Sunday Night | 33°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph W | 23% |
| Monday | 51°F | Partly Sunny | 5 to 10 mph SW | 8% |
| Monday Night | 36°F | Slight Chance Rain Showers | 10 mph W | 15% |
| Tuesday | 48°F | Slight Chance Rain Showers | 10 to 15 mph NW | 15% |
| Tuesday Night | 32°F | Slight Chance Rain Showers then Mostly Cloudy | 5 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
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 Nov 4, 2026.