Grand Marais weather by month
What a typical year looks like in Grand Marais, Minnesota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Grand Marais, 1 km from Grand Marais; records cover 1897–2026.
The year at a glance
- Precipitation a year
- 25.7 in654 mm
- Snow a year
- 51 in129 cm
- Last spring freeze
- May 17
- First fall freeze
- Oct 2
- Heating degree days
- 9,762
- Cooling degree days
- 52
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −16°−27° (heating, 99%) and 84°29° (cooling, 1%).
Month by month
Grand Marais in January
Highs average 21°−6° and lows 6°−15°, with 0.99 in25 mm of precipitation and 16 in40 cm of snow in a typical January.
- Record high
- 52°11° (1897)
- Record low
- −34°−37° (1935)
- Heating degree days
- 1595
- Cooling degree days
- 0
Grand Marais in February
Highs average 25°−4° and lows 8°−13°, with 0.72 in18 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 58°14° (1976)
- Record low
- −34°−37° (1933)
- Heating degree days
- 1366
- Cooling degree days
- 0
Grand Marais in March
Highs average 33°1° and lows 18°−8°, with 0.95 in24 mm of precipitation and 6 in15 cm of snow in a typical March.
- Record high
- 67°19° (1986)
- Record low
- −24°−31° (1943)
- Heating degree days
- 1221
- Cooling degree days
- 0
Grand Marais in April
Highs average 44°6° and lows 29°−2°, with 1.8 in47 mm of precipitation and 3 in8 cm of snow in a typical April.
- Record high
- 83°28° (1965)
- Record low
- −8°−22° (1975)
- Heating degree days
- 867
- Cooling degree days
- 0
Grand Marais in May
Highs average 53°12° and lows 37°3°, with 2.6 in66 mm of precipitation in a typical May.
- Record high
- 88°31° (1986)
- Record low
- 17°−8° (1947)
- Heating degree days
- 608
- Cooling degree days
- 0
Grand Marais in June
Highs average 61°16° and lows 44°7°, with 3.6 in90 mm of precipitation in a typical June.
- Record high
- 93°34° (1970)
- Record low
- 25°−4° (1947)
- Heating degree days
- 373
- Cooling degree days
- 1
Grand Marais in July
Highs average 69°21° and lows 52°11°, with 3.4 in86 mm of precipitation in a typical July.
- Record high
- 99°37° (1925)
- Record low
- 28°−2° (1950)
- Heating degree days
- 166
- Cooling degree days
- 25
Grand Marais in August
Highs average 70°21° and lows 54°12°, with 2.6 in65 mm of precipitation in a typical August.
- Record high
- 100°38° (1930)
- Record low
- 33°1° (1947)
- Heating degree days
- 124
- Cooling degree days
- 23
Grand Marais in September
Highs average 62°17° and lows 47°8°, with 2.8 in72 mm of precipitation in a typical September.
- Record high
- 90°32° (1929)
- Record low
- 23°−5° (1942)
- Heating degree days
- 315
- Cooling degree days
- 3
Grand Marais in OctoberThis month
Highs average 50°10° and lows 36°2°, with 3 in77 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 77°25° (1962)
- Record low
- 6°−14° (1936)
- Heating degree days
- 680
- Cooling degree days
- 0
Grand Marais in November
Highs average 37°3° and lows 24°−4°, with 1.8 in46 mm of precipitation and 4 in10 cm of snow in a typical November.
- Record high
- 67°19° (1975)
- Record low
- −14°−26° (1976)
- Heating degree days
- 1035
- Cooling degree days
- 0
Grand Marais in December
Highs average 26°−3° and lows 13°−11°, with 1.5 in37 mm of precipitation and 13 in34 cm of snow in a typical December.
- Record high
- 69°21° (1913)
- Record low
- −34°−37° (1917)
- Heating degree days
- 1412
- Cooling degree days
- 0