The best times to visit Grand Marais for ideal weather are

July 2nd to September 9th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Grand Marais Travel Info

Weather in Grand Marais


Average temperatures in Grand Marais vary drastically. Considering humidity, temperatures feel cold for most of the year with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 27th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Grand Marais, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 73.8°F (23.2°C) with temperatures rarely dropping below 54.6°F (12.6°C) at night.

Grand Marais Temperatures (Fahrenheit)


Grand Marais Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Grand Marais Perceived Temperature (F)


Grand Marais Perceived Temperature (C)



Average Grand Marais Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 24.2 15.7 6.9
Feb 25 16.4 7.7
Mar 36.7 28 19.9
Apr 46.6 37.6 30.7
May 56 45.5 38.4
Jun 63 51.8 44.3
Jul 71.4 60.2 52.2
Aug 71.1 61.2 53.6
Sep 64.3 55.8 48.7
Oct 53.1 45.8 38.9
Nov 40.9 33.9 27.2
Dec 28.5 21 13.5

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -4.3 -9.1 -13.9
Feb -3.9 -8.7 -13.5
Mar 2.6 -2.2 -6.7
Apr 8.1 3.1 -0.7
May 13.3 7.5 3.6
Jun 17.2 11 6.8
Jul 21.9 15.7 11.2
Aug 21.7 16.2 12
Sep 17.9 13.2 9.3
Oct 11.7 7.7 3.8
Nov 4.9 1.1 -2.7
Dec -1.9 -6.1 -10.3



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Grand Marais are February, January, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late January and early February. For example, on the week of January 29th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid June with an average of 3 days of significant precipitation the week of June 18th.

When can you find snow in Grand Marais? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Grand Marais.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Grand Marais (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 9% 0 1.2
Feb 9% 0 0.8
Mar 12% 0 1.3
Apr 19% 0 2.6
May 23% 0 3.1
Jun 30% 0 5
Jul 23% 0 3.8
Aug 17% 0 2.4
Sep 20% 0 2.9
Oct 19% 0 3.2
Nov 15% 0 2.3
Dec 14% 0 1.6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 9 0 3
Feb 9 0 2
Mar 12 0 3.3
Apr 19 0 6.6
May 23 0 7.9
Jun 30 0 12.7
Jul 23 0 9.7
Aug 17 0 6.1
Sep 20 0 7.4
Oct 19 0 8.1
Nov 15 0 5.8
Dec 14 0 4.1


Humidity and Wind

Grand Marais has some very humid months, with other comfortably humid months. The least humid month is February (50.4% relative humidity), and the most humid month is June (72%).

Wind in Grand Marais is usually calm. The windiest month is January, followed by February and December. January’s average wind speed of around 6.8 knots (7.8 MPH or 12.6 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late January where average top sustained speeds reach 16 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Grand Marais.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 6.8 Light breeze 15.4 Significant breeze
Feb 6.5 Light breeze 14 Significant breeze
Mar 5.8 Light breeze 12.4 Significant breeze
Apr 5.9 Light breeze 12.6 Significant breeze
May 5.4 Light breeze 11.6 Significant breeze
Jun 4.2 Light breeze 9.7 Gentle breeze
Jul 3.2 Barely noticeable 8.3 Significant breeze
Aug 3.4 Barely noticeable 8.3 Gentle breeze
Sep 3.8 Barely noticeable 9.7 Significant breeze
Oct 5.5 Light breeze 12.1 Significant breeze
Nov 5.7 Light breeze 13 Significant breeze
Dec 6.5 Light breeze 14 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 54%
Feb 50.4%
Mar 56%
Apr 54.7%
May 62.7%
Jun 72%
Jul 71.5%
Aug 71.3%
Sep 71.3%
Oct 65.7%
Nov 61.9%
Dec 58.8%


Is it Safe to Travel to Grand Marais?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Grand Marais, MN, US is April, followed by June and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Grand Marais in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 54.2 in November means 54.2% of the tourists vs. April.



Overall Grand Marais Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 59.3°F (15.2°C) and 26.6°F (-3°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 7 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see the most precipitation with 5 to 9 days of precipitation per month. June – August is the second busiest season for tourism in Grand Marais, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 66.8°F (19.3°C) and 32.8°F (0.4°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 6 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Grand Marais to be enjoyable for warm weather travelers. The average high during this season is between 29.8°F (-1.2°C) and 22.2°F (-5.4°C). On average, it rains or snows a smalll amount: 3 to 4 times per month. These times of year are fairly slow with tourists.


Best Times to Travelthe United States › Grand Marais, MN, US