Round Lake weather by month
What a typical year looks like in Round Lake, Minnesota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Lake Park 3sse, 20 km from Round Lake; records cover 1912–2026.
The year at a glance
- Precipitation a year
- 31.4 in798 mm
- Snow a year
- 41 in104 cm
- Last spring freeze
- Apr 27
- First fall freeze
- Oct 5
- Heating degree days
- 7,700
- Cooling degree days
- 837
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −14°−26° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Round Lake in January
Highs average 24°−4° and lows 6°−15°, with 0.82 in21 mm of precipitation and 8 in21 cm of snow in a typical January.
- Record high
- 67°19° (1981)
- Record low
- −38°−39° (1918)
- Heating degree days
- 1553
- Cooling degree days
- 0
Round Lake in February
Highs average 29°−2° and lows 10°−12°, with 0.84 in21 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 67°19° (2024)
- Record low
- −33°−36° (1917)
- Heating degree days
- 1285
- Cooling degree days
- 0
Round Lake in March
Highs average 42°5° and lows 22°−6°, with 1.7 in42 mm of precipitation and 6 in16 cm of snow in a typical March.
- Record high
- 87°31° (2012)
- Record low
- −24°−31° (1948)
- Heating degree days
- 1030
- Cooling degree days
- 1
Round Lake in April
Highs average 57°14° and lows 34°1°, with 3.4 in86 mm of precipitation and 3 in9 cm of snow in a typical April.
- Record high
- 96°36° (2007)
- Record low
- 1°−17° (1936)
- Heating degree days
- 583
- Cooling degree days
- 4
Round Lake in May
Highs average 70°21° and lows 47°9°, with 4.6 in117 mm of precipitation in a typical May.
- Record high
- 107°42° (1934)
- Record low
- 16°−9° (1967)
- Heating degree days
- 243
- Cooling degree days
- 47
Round Lake in June
Highs average 81°27° and lows 59°15°, with 5 in128 mm of precipitation in a typical June.
- Record high
- 106°41° (2011)
- Record low
- 34°1° (1915)
- Heating degree days
- 37
- Cooling degree days
- 192
Round Lake in July
Highs average 85°30° and lows 63°17°, with 3.8 in97 mm of precipitation in a typical July.
- Record high
- 107°42° (1936)
- Record low
- 42°6° (1915)
- Heating degree days
- 7
- Cooling degree days
- 288
Round Lake in August
Highs average 83°28° and lows 60°16°, with 3.5 in89 mm of precipitation in a typical August.
- Record high
- 105°41° (1936)
- Record low
- 36°2° (1915)
- Heating degree days
- 15
- Cooling degree days
- 211
Round Lake in September
Highs average 76°24° and lows 51°11°, with 2.9 in74 mm of precipitation in a typical September.
- Record high
- 103°39° (2022)
- Record low
- 22°−6° (1913)
- Heating degree days
- 134
- Cooling degree days
- 85
Round Lake in OctoberThis month
Highs average 61°16° and lows 38°3°, with 2.4 in61 mm of precipitation and 0.6 in1.5 cm of snow in a typical October.
- Record high
- 95°35° (2006)
- Record low
- 6°−14° (1917)
- Heating degree days
- 498
- Cooling degree days
- 9
Round Lake in November
Highs average 43°6° and lows 24°−5°, with 1.5 in38 mm of precipitation and 4 in11 cm of snow in a typical November.
- Record high
- 80°27° (2008)
- Record low
- −11°−24° (1937)
- Heating degree days
- 940
- Cooling degree days
- 0
Round Lake in December
Highs average 29°−2° and lows 12°−11°, with 0.98 in25 mm of precipitation and 9 in23 cm of snow in a typical December.
- Record high
- 68°20° (1939)
- Record low
- −29°−34° (1917)
- Heating degree days
- 1375
- Cooling degree days
- 0