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.
Grand Marais Travel Guide
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)
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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
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.
Snow on the Ground
The graph below shows the average snow on the ground in Grand Marais (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
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.
The graph below shows wind speed (max and average) in knots.
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|
Is it Safe to Travel to Grand Marais?
Our best data indicates this area is generally safe. As of Oct 07, 2019 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 Sep 23, 2019.
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
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.