Mahnomen weather by month
What a typical year looks like in Mahnomen, Minnesota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at CLOQUET, 8 km from Mahnomen; records cover 1911–2026.
The year at a glance
- Precipitation a year
- 32.7 in830 mm
- Snow a year
- 71 in181 cm
- Last spring freeze
- May 28
- First fall freeze
- Sep 21
- Heating degree days
- 9,395
- Cooling degree days
- 211
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −22°−30° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Mahnomen in January
Highs average 18°−8° and lows 2°−17°, with 1 in25 mm of precipitation and 14 in34 cm of snow in a typical January.
- Record high
- 52°11° (1942)
- Record low
- −45°−43° (1912)
- Heating degree days
- 1706
- Cooling degree days
- 0
Mahnomen in February
Highs average 24°−4° and lows 5°−15°, with 0.98 in25 mm of precipitation and 14 in34 cm of snow in a typical February.
- Record high
- 57°14° (1976)
- Record low
- −41° (1939)
- Heating degree days
- 1420
- Cooling degree days
- 0
Mahnomen in March
Highs average 37°3° and lows 16°−9°, with 1.4 in37 mm of precipitation and 10 in26 cm of snow in a typical March.
- Record high
- 79°26° (1946)
- Record low
- −35°−37° (1962)
- Heating degree days
- 1195
- Cooling degree days
- 0
Mahnomen in April
Highs average 50°10° and lows 28°−2°, with 2.4 in61 mm of precipitation and 6 in16 cm of snow in a typical April.
- Record high
- 88°31° (1952)
- Record low
- −7°−22° (1954)
- Heating degree days
- 776
- Cooling degree days
- 0
Mahnomen in May
Highs average 64°18° and lows 38°4°, with 3.5 in88 mm of precipitation and 0.3 in0.8 cm of snow in a typical May.
- Record high
- 94°34° (1939)
- Record low
- 8°−13° (1911)
- Heating degree days
- 428
- Cooling degree days
- 5
Mahnomen in June
Highs average 74°23° and lows 48°9°, with 4.8 in121 mm of precipitation in a typical June.
- Record high
- 98°37° (1931)
- Record low
- 24°−4° (1945)
- Heating degree days
- 161
- Cooling degree days
- 30
Mahnomen in July
Highs average 79°26° and lows 54°12°, with 4.3 in110 mm of precipitation in a typical July.
- Record high
- 105°41° (1936)
- Record low
- 30°−1° (1915)
- Heating degree days
- 53
- Cooling degree days
- 92
Mahnomen in August
Highs average 76°25° and lows 53°12°, with 4.2 in106 mm of precipitation in a typical August.
- Record high
- 98°37° (1947)
- Record low
- 26°−3° (1915)
- Heating degree days
- 79
- Cooling degree days
- 67
Mahnomen in September
Highs average 67°20° and lows 46°8°, with 3.6 in90 mm of precipitation in a typical September.
- Record high
- 98°37° (2023)
- Record low
- 19°−7° (1947)
- Heating degree days
- 275
- Cooling degree days
- 17
Mahnomen in OctoberThis month
Highs average 52°11° and lows 34°1°, with 3.3 in83 mm of precipitation and 1.8 in4.6 cm of snow in a typical October.
- Record high
- 86°30° (1922)
- Record low
- 0°−18° (1936)
- Heating degree days
- 682
- Cooling degree days
- 0
Mahnomen in November
Highs average 35°2° and lows 22°−6°, with 1.8 in46 mm of precipitation and 10 in24 cm of snow in a typical November.
- Record high
- 72°22° (2020)
- Record low
- −24°−31° (1921)
- Heating degree days
- 1096
- Cooling degree days
- 0
Mahnomen in December
Highs average 23°−5° and lows 9°−13°, with 1.5 in37 mm of precipitation and 16 in40 cm of snow in a typical December.
- Record high
- 57°14° (1962)
- Record low
- −37°−38° (1917)
- Heating degree days
- 1524
- Cooling degree days
- 0