Turtle Lake weather by month
What a typical year looks like in Turtle Lake, Wisconsin: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at FORT ATKINSON WWTP, 24 km from Turtle Lake; records cover 1941–2026.
The year at a glance
- Precipitation a year
- 35.5 in903 mm
- Snow a year
- 36 in92 cm
- Last spring freeze
- Apr 28
- First fall freeze
- Oct 8
- Heating degree days
- 7,101
- Cooling degree days
- 672
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −11°−24° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Turtle Lake in January
Highs average 28°−2° and lows 11°−12°, with 1.5 in38 mm of precipitation and 11 in27 cm of snow in a typical January.
- Record high
- 58°14° (1944)
- Record low
- −33°−36° (1951)
- Heating degree days
- 1420
- Cooling degree days
- 0
Turtle Lake in February
Highs average 32°0° and lows 14°−10°, with 1.4 in36 mm of precipitation and 9 in24 cm of snow in a typical February.
- Record high
- 72°22° (2017)
- Record low
- −39° (1996)
- Heating degree days
- 1184
- Cooling degree days
- 0
Turtle Lake in March
Highs average 44°6° and lows 25°−4°, with 2 in50 mm of precipitation and 4 in10 cm of snow in a typical March.
- Record high
- 84°29° (2012)
- Record low
- −21°−29° (1962)
- Heating degree days
- 957
- Cooling degree days
- 1
Turtle Lake in April
Highs average 57°14° and lows 36°2°, with 3.6 in90 mm of precipitation and 1.2 in3 cm of snow in a typical April.
- Record high
- 90°32° (1980)
- Record low
- −4°−20° (1979)
- Heating degree days
- 557
- Cooling degree days
- 4
Turtle Lake in May
Highs average 69°21° and lows 48°9°, with 4.1 in105 mm of precipitation and 0.2 in0.5 cm of snow in a typical May.
- Record high
- 96°36° (2012)
- Record low
- 25°−4° (1966)
- Heating degree days
- 249
- Cooling degree days
- 42
Turtle Lake in June
Highs average 79°26° and lows 58°14°, with 5 in126 mm of precipitation in a typical June.
- Record high
- 101°38° (1988)
- Record low
- 33°1° (1945)
- Heating degree days
- 46
- Cooling degree days
- 147
Turtle Lake in July
Highs average 83°28° and lows 62°17°, with 4 in102 mm of precipitation in a typical July.
- Record high
- 103°39° (2011)
- Record low
- 39°4° (1965)
- Heating degree days
- 8
- Cooling degree days
- 228
Turtle Lake in August
Highs average 81°27° and lows 60°15°, with 3.9 in98 mm of precipitation in a typical August.
- Record high
- 102°39° (1988)
- Record low
- 37°3° (1986)
- Heating degree days
- 18
- Cooling degree days
- 176
Turtle Lake in September
Highs average 74°23° and lows 51°11°, with 3.3 in85 mm of precipitation in a typical September.
- Record high
- 98°37° (1953)
- Record low
- 28°−2° (1942)
- Heating degree days
- 140
- Cooling degree days
- 67
Turtle Lake in OctoberThis month
Highs average 61°16° and lows 40°4°, with 2.8 in72 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 88°31° (1971)
- Record low
- 11°−12° (1988)
- Heating degree days
- 463
- Cooling degree days
- 7
Turtle Lake in November
Highs average 46°8° and lows 29°−2°, with 2.2 in56 mm of precipitation and 2.1 in5.3 cm of snow in a typical November.
- Record high
- 78°26° (1999)
- Record low
- −14°−26° (1947)
- Heating degree days
- 836
- Cooling degree days
- 0
Turtle Lake in December
Highs average 33°1° and lows 18°−8°, with 1.7 in43 mm of precipitation and 9 in22 cm of snow in a typical December.
- Record high
- 67°19° (2001)
- Record low
- −29°−34° (1983)
- Heating degree days
- 1223
- Cooling degree days
- 0