Grand Marais, MI Weather & Growing Conditions
Today
84°F
Partly Sunny then Showers And Thunderstorms Likely
Showers and thunderstorms likely after 2pm. Partly sunny. High near 84, with temperatures falling to around 72 in the afternoon. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Partly Sunny then Showers And Thunderstorms Likely | 5 to 15 mph SW | 61% |
| Tonight | 58°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 40% |
| Wednesday | 74°F | Mostly Sunny | 0 to 5 mph NW | 9% |
| Wednesday Night | 57°F | Partly Cloudy | 0 to 5 mph SE | 0% |
| Thursday | 83°F | Sunny | 5 mph S | 4% |
| Thursday Night | 63°F | Mostly Clear | 5 to 10 mph S | 4% |
| Friday | 87°F | Sunny | 10 mph SW | 14% |
| Friday Night | 64°F | Chance Rain Showers | 5 to 10 mph S | 38% |
| Saturday | 80°F | Slight Chance Showers And Thunderstorms | 5 mph W | 25% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 42% |
| Sunday | 79°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 35% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms | 5 mph W | 34% |
| Monday | 76°F | Partly Sunny | 5 mph W | 13% |
| Monday Night | 57°F | Slight Chance Rain Showers | 0 to 5 mph NW | 18% |
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 Aug 4, 2026.