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Monthly climate in Grand Marais, Minnesota, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Grand Marais features a humid continental climate (Dfb). Temperatures typically range between -10 °C (14 °F) and 17 °C (62 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 25 °C (77 °F). The average annual precipitation amounts to about 781 mm (30.7 inches) and receives 113 rainy days on the 1 mm (0.04 inches) threshold annually. Grand Marais enjoys an average of 2874 hours of sunshine throughout the year, and daylight varies from 8 hours 27 minutes to 15 hours 55 minutes per day.

Monthly average temperatures in Grand Marais, Minnesota, United States §

The warmest months in Grand Marais are July, August and September, with daily mean temperatures ranging from 13 to 17 °C (56 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -10 to -6 °C (14 - 21 °F) throughout the day. On average each year, Grand Marais experiences 0 days above 25 °C (77.0 °F) and 155 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grand Marais, Minnesota, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 3°C
(38°F)		 7°C
(44°F)		 8°C
(47°F)		 12°C
(54°F)		 17°C
(63°F)		 21°C
(71°F)		 25°C
(77°F)		 25°C
(77°F)		 23°C
(73°F)		 18°C
(64°F)		 13°C
(55°F)		 9°C
(48°F)
Mean maximum 1°C
(35°F)		 2°C
(36°F)		 6°C
(43°F)		 10°C
(50°F)		 16°C
(60°F)		 19°C
(66°F)		 22°C
(72°F)		 22°C
(73°F)		 21°C
(70°F)		 16°C
(61°F)		 8°C
(46°F)		 5°C
(41°F)
Average high -6°C
(21°F)		 -7°C
(20°F)		 -0°C
(31°F)		 4°C
(39°F)		 10°C
(50°F)		 14°C
(58°F)		 18°C
(65°F)		 19°C
(67°F)		 16°C
(60°F)		 9°C
(48°F)		 1°C
(35°F)		 -3°C
(27°F)
Daily mean -9°C
(15°F)		 -10°C
(14°F)		 -4°C
(26°F)		 1°C
(34°F)		 7°C
(44°F)		 11°C
(53°F)		 16°C
(60°F)		 17°C
(62°F)		 13°C
(56°F)		 7°C
(45°F)		 -1°C
(31°F)		 -6°C
(21°F)
Average low -13°C
(10°F)		 -14°C
(8°F)		 -7°C
(20°F)		 -2°C
(29°F)		 4°C
(40°F)		 8°C
(47°F)		 13°C
(55°F)		 14°C
(58°F)		 11°C
(52°F)		 5°C
(41°F)		 -3°C
(27°F)		 -9°C
(16°F)
Mean minimum -23°C
(-10°F)		 -25°C
(-12°F)		 -18°C
(1°F)		 -8°C
(18°F)		 -1°C
(30°F)		 5°C
(42°F)		 9°C
(49°F)		 11°C
(51°F)		 6°C
(43°F)		 -1°C
(30°F)		 -11°C
(12°F)		 -20°C
(-4°F)
Minimum -28°C
(-19°F)		 -29°C
(-20°F)		 -23°C
(-10°F)		 -11°C
(12°F)		 -4°C
(26°F)		 3°C
(37°F)		 7°C
(46°F)		 10°C
(50°F)		 2°C
(36°F)		 -5°C
(24°F)		 -14°C
(7°F)		 -27°C
(-16°F)

Compare climate in Grand Marais with other places

Compare temperature, precipitation, sunshine, UV index in Grand Marais, Minnesota, United States with other places around the world.

Monthly average precipitation in Grand Marais, Minnesota, United States §

Grand Marais usually has the most precipitation in August, September and October, with an average of 11 rainy days and 94 mm (3.7 inches) of precipitation per month. The driest months in Grand Marais are January, February and March. On average, 38 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grand Marais, Minnesota, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 33 (1.3) 40 (1.6) 42 (1.6) 67 (2.6) 67 (2.6) 69 (2.7) 63 (2.5) 78 (3.1) 103 (4.1) 101 (4.0) 54 (2.1) 63 (2.5)
Average precipitation days (≥ 1 mm) 7 9 6 9 10 11 8 10 12 12 9 10

Monthly sunshine hours in Grand Marais, Minnesota, United States §

The sunniest months in Grand Marais are June, July and August, when the sun shines an average of 11 hours 7 minutes a day. Least sunny months in Grand Marais: January, November and December receive an average of 4 hours 19 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grand Marais, Minnesota, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 114 194 254 254 309 346 357 319 253 187 147 135
Mean daily daylight hours 8h 53m 10h 15m 11h 56m 13h 40m 15h 10m 15h 55m 15h 30m 14h 10m 12h 30m 10h 46m 9h 15m 8h 27m

Solar UV radiation in Grand Marais, Minnesota, United States §

Grand Marais experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Grand Marais UV Index data.

Average daily maximum UV levels by month for Grand Marais, Minnesota, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 4 5 6 8 9 9 8 7 5 2 1

Detailed Monthly Weather Insights for Grand Marais, Minnesota, United States

Discover in-depth weather details for every month in Grand Marais. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Grand Marais's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.