Cottage Grove weather by month
What a typical year looks like in Cottage Grove, Minnesota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at ST. PAUL DOWNTOWN AIRPORT, 17 km from Cottage Grove; records cover 1872–2026.
The year at a glance
- Precipitation a year
- 29.2 in742 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 20
- First fall freeze
- Oct 11
- Heating degree days
- 7,445
- Cooling degree days
- 726
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 93°34° (cooling, 1%).
Month by month
Cottage Grove in January
Highs average 24°−5° and lows 9°−13°, with 0.48 in12 mm of precipitation in a typical January.
- Record high
- 58°14° (1944)
- Record low
- −41° (1888)
- Heating degree days
- 1511
- Cooling degree days
- 0
Cottage Grove in February
Highs average 29°−2° and lows 13°−11°, with 0.52 in13 mm of precipitation in a typical February.
- Record high
- 64°18° (2000)
- Record low
- −33°−36° (1888)
- Heating degree days
- 1238
- Cooling degree days
- 0
Cottage Grove in March
Highs average 42°5° and lows 25°−4°, with 1.4 in36 mm of precipitation in a typical March.
- Record high
- 83°28° (1910)
- Record low
- −23°−31° (1948)
- Heating degree days
- 988
- Cooling degree days
- 0
Cottage Grove in April
Highs average 57°14° and lows 37°3°, with 2.6 in66 mm of precipitation in a typical April.
- Record high
- 93°34° (1952)
- Record low
- 6°−14° (1924)
- Heating degree days
- 543
- Cooling degree days
- 3
Cottage Grove in May
Highs average 69°21° and lows 49°9°, with 4 in101 mm of precipitation in a typical May.
- Record high
- 99°37° (2018)
- Record low
- 23°−5° (1907)
- Heating degree days
- 225
- Cooling degree days
- 36
Cottage Grove in June
Highs average 79°26° and lows 59°15°, with 4.6 in118 mm of precipitation in a typical June.
- Record high
- 101°38° (1931)
- Record low
- 34°1° (1945)
- Heating degree days
- 35
- Cooling degree days
- 150
Cottage Grove in July
Highs average 83°28° and lows 64°18°, with 4 in101 mm of precipitation in a typical July.
- Record high
- 104°40° (1901)
- Record low
- 45°7° (1895)
- Heating degree days
- 5
- Cooling degree days
- 262
Cottage Grove in August
Highs average 80°27° and lows 62°17°, with 4.1 in104 mm of precipitation in a typical August.
- Record high
- 104°40° (1947)
- Record low
- 39°4° (1950)
- Heating degree days
- 10
- Cooling degree days
- 198
Cottage Grove in September
Highs average 72°22° and lows 53°12°, with 3.1 in78 mm of precipitation in a typical September.
- Record high
- 101°38° (1931)
- Record low
- 28°−2° (1899)
- Heating degree days
- 133
- Cooling degree days
- 70
Cottage Grove in OctoberThis month
Highs average 58°14° and lows 40°4°, with 2.5 in63 mm of precipitation in a typical October.
- Record high
- 91°33° (2023)
- Record low
- 8°−13° (1925)
- Heating degree days
- 503
- Cooling degree days
- 7
Cottage Grove in November
Highs average 42°6° and lows 27°−3°, with 1.3 in34 mm of precipitation in a typical November.
- Record high
- 78°26° (1999)
- Record low
- −25°−32° (1875)
- Heating degree days
- 912
- Cooling degree days
- 0
Cottage Grove in December
Highs average 29°−2° and lows 15°−10°, with 0.65 in17 mm of precipitation in a typical December.
- Record high
- 63°17° (1939)
- Record low
- −39° (1879)
- Heating degree days
- 1342
- Cooling degree days
- 0