Cass Lake weather by month
What a typical year looks like in Cass Lake, Minnesota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Cass Lake, 1 km from Cass Lake; records cover 1911–2026.
The year at a glance
- Precipitation a year
- 26.5 in673 mm
- Snow a year
- 49 in124 cm
- Last spring freeze
- May 19
- First fall freeze
- Sep 23
- Heating degree days
- 9,457
- Cooling degree days
- 375
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −28°−33° (heating, 99%) and 90°32° (cooling, 1%).
Month by month
Cass Lake in January
Highs average 18°−8° and lows −4°−20°, with 0.76 in19 mm of precipitation and 9 in23 cm of snow in a typical January.
- Record high
- 56°13° (2012)
- Record low
- −48°−44° (1996)
- Heating degree days
- 1795
- Cooling degree days
- 0
Cass Lake in February
Highs average 24°−5° and lows 0°−18°, with 0.74 in19 mm of precipitation and 9 in24 cm of snow in a typical February.
- Record high
- 60°16° (1958)
- Record low
- −48°−44° (1996)
- Heating degree days
- 1495
- Cooling degree days
- 0
Cass Lake in March
Highs average 37°3° and lows 15°−10°, with 1.2 in31 mm of precipitation and 6 in16 cm of snow in a typical March.
- Record high
- 74°23° (2012)
- Record low
- −37°−38° (1962)
- Heating degree days
- 1217
- Cooling degree days
- 0
Cass Lake in April
Highs average 51°11° and lows 29°−2°, with 2 in50 mm of precipitation and 6 in14 cm of snow in a typical April.
- Record high
- 96°36° (1980)
- Record low
- −15°−26° (1954)
- Heating degree days
- 752
- Cooling degree days
- 0
Cass Lake in May
Highs average 65°18° and lows 42°6°, with 2.9 in74 mm of precipitation in a typical May.
- Record high
- 95°35° (1964)
- Record low
- 10°−12° (1966)
- Heating degree days
- 368
- Cooling degree days
- 16
Cass Lake in June
Highs average 75°24° and lows 53°12°, with 4.1 in103 mm of precipitation in a typical June.
- Record high
- 100°38° (2021)
- Record low
- 25°−4° (1964)
- Heating degree days
- 104
- Cooling degree days
- 73
Cass Lake in July
Highs average 79°26° and lows 58°14°, with 3.7 in95 mm of precipitation in a typical July.
- Record high
- 104°40° (1988)
- Record low
- 33°1° (1984)
- Heating degree days
- 37
- Cooling degree days
- 147
Cass Lake in August
Highs average 77°25° and lows 56°13°, with 3.1 in78 mm of precipitation in a typical August.
- Record high
- 101°38° (1976)
- Record low
- 26°−3° (1982)
- Heating degree days
- 60
- Cooling degree days
- 109
Cass Lake in September
Highs average 68°20° and lows 47°8°, with 2.9 in74 mm of precipitation in a typical September.
- Record high
- 98°37° (1983)
- Record low
- 17°−8° (1965)
- Heating degree days
- 255
- Cooling degree days
- 29
Cass Lake in OctoberThis month
Highs average 52°11° and lows 34°1°, with 2.8 in70 mm of precipitation and 1.4 in3.6 cm of snow in a typical October.
- Record high
- 92°33° (1963)
- Record low
- 2°−17° (1952)
- Heating degree days
- 683
- Cooling degree days
- 1
Cass Lake in November
Highs average 36°2° and lows 20°−7°, with 1.3 in33 mm of precipitation and 6 in15 cm of snow in a typical November.
- Record high
- 76°24° (2020)
- Record low
- −31°−35° (1964)
- Heating degree days
- 1118
- Cooling degree days
- 0
Cass Lake in December
Highs average 23°−5° and lows 6°−15°, with 1 in26 mm of precipitation and 12 in29 cm of snow in a typical December.
- Record high
- 58°14° (1962)
- Record low
- −46°−43° (1983)
- Heating degree days
- 1573
- Cooling degree days
- 0