Grand Marais, MI Weather & Growing Conditions
Today
83°F
Mostly Sunny then Chance Showers And Thunderstorms
Rain showers likely between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny. High near 83, with temperatures falling to around 74 in the afternoon. Southwest wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 60% |
| Tonight | 55°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 46% |
| Wednesday | 77°F | Partly Sunny | 0 to 5 mph NW | 12% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph E | 2% |
| Thursday | 82°F | Sunny | 0 to 10 mph S | 5% |
| Thursday Night | 59°F | Mostly Clear | 5 to 10 mph S | 5% |
| Friday | 86°F | Sunny | 5 to 10 mph SW | 13% |
| Friday Night | 61°F | Chance Rain Showers | 5 to 10 mph S | 36% |
| Saturday | 82°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 30% |
| Saturday Night | 58°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 43% |
| Sunday | 80°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 39% |
| Sunday Night | 56°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 39% |
| Monday | 77°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph NW | 15% |
| Monday Night | 54°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 20% |
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 Aug 4, 2026.