Grand Marais, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grand Marais, a city in Cook County, Minnesota.
This Afternoon
60°F
Partly Sunny
Partly sunny, with a high near 60. Southeast wind around 0 mph.
7-day forecast for Grand Marais
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Partly Sunny | 0 mph | 3% |
| Tonight | 50°F | Slight Chance Rain Showers | 0 to 5 mph N | 20% |
| Sunday | 60°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Sunday Night | 44°F | Mostly Cloudy | 0 to 5 mph NE | 0% |
| Monday | 57°F | Partly Sunny | 5 mph E | 0% |
| Monday Night | 43°F | Mostly Clear | 0 to 5 mph E | 0% |
| Tuesday | 59°F | Sunny | 0 to 5 mph E | 0% |
| Tuesday Night | 44°F | Mostly Clear | 0 to 5 mph E | 0% |
| Wednesday | 60°F | Sunny | 0 to 5 mph E | 0% |
| Wednesday Night | 45°F | Mostly Clear | 0 to 5 mph E | 0% |
| Thursday | 61°F | Mostly Sunny | 0 to 5 mph E | 3% |
| Thursday Night | 48°F | Partly Cloudy | 0 mph | 6% |
| Friday | 64°F | Mostly Sunny | 0 to 5 mph SW | 6% |
| Friday Night | 50°F | Partly Cloudy | 0 mph | 3% |
Forecast source: National Weather Service (api.weather.gov) for Grand Marais (47.759, -90.344). Updated through the day.
Growing snapshot for Grand Marais
Last spring frost
May 23
First fall frost
Sep 26
Growing season
124 days
Hardiness zone
3b
More local growing data for Grand Marais: nearby ZIP 55604 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Gunflint Lake 10 Nw, Mn (18.2 mi from Grand Marais). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.