Oshkosh weather by month
What a typical year looks like in Oshkosh, Wisconsin: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at OSHKOSH, 1 km from Oshkosh; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 33.3 in846 mm
- Snow a year
- 39 in100 cm
- Last spring freeze
- Apr 27
- First fall freeze
- Oct 17
- Heating degree days
- 7,337
- Cooling degree days
- 664
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −10°−23° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Oshkosh in January
Highs average 26°−3° and lows 10°−12°, with 1.3 in34 mm of precipitation and 10 in25 cm of snow in a typical January.
- Record high
- 57°14° (1944)
- Record low
- −32°−36° (1951)
- Heating degree days
- 1452
- Cooling degree days
- 0
Oshkosh in February
Highs average 30°−1° and lows 13°−11°, with 1.1 in28 mm of precipitation and 10 in26 cm of snow in a typical February.
- Record high
- 72°22° (2024)
- Record low
- −34°−37° (1929)
- Heating degree days
- 1221
- Cooling degree days
- 0
Oshkosh in March
Highs average 41°5° and lows 24°−5°, with 1.9 in49 mm of precipitation and 5 in14 cm of snow in a typical March.
- Record high
- 83°28° (1910)
- Record low
- −24°−31° (1962)
- Heating degree days
- 1011
- Cooling degree days
- 0
Oshkosh in April
Highs average 54°12° and lows 36°2°, with 3.2 in82 mm of precipitation and 1.8 in4.6 cm of snow in a typical April.
- Record high
- 91°33° (1980)
- Record low
- 5°−15° (1899)
- Heating degree days
- 600
- Cooling degree days
- 2
Oshkosh in May
Highs average 67°20° and lows 48°9°, with 3.9 in100 mm of precipitation in a typical May.
- Record high
- 104°40° (1934)
- Record low
- 20°−7° (1966)
- Heating degree days
- 262
- Cooling degree days
- 34
Oshkosh in June
Highs average 77°25° and lows 59°15°, with 4.8 in122 mm of precipitation in a typical June.
- Record high
- 102°39° (1934)
- Record low
- 28°−2° (1922)
- Heating degree days
- 49
- Cooling degree days
- 140
Oshkosh in July
Highs average 82°28° and lows 63°17°, with 3.8 in96 mm of precipitation in a typical July.
- Record high
- 107°42° (1936)
- Record low
- 30°−1° (1922)
- Heating degree days
- 8
- Cooling degree days
- 231
Oshkosh in August
Highs average 80°27° and lows 61°16°, with 3.4 in86 mm of precipitation in a typical August.
- Record high
- 102°39° (1937)
- Record low
- 32°0° (1915)
- Heating degree days
- 16
- Cooling degree days
- 184
Oshkosh in September
Highs average 73°23° and lows 53°12°, with 3.3 in83 mm of precipitation in a typical September.
- Record high
- 99°37° (1931)
- Record low
- 25°−4° (1949)
- Heating degree days
- 139
- Cooling degree days
- 67
Oshkosh in OctoberThis month
Highs average 59°15° and lows 41°5°, with 2.9 in73 mm of precipitation and 0.3 in0.8 cm of snow in a typical October.
- Record high
- 90°32° (1963)
- Record low
- 8°−13° (1925)
- Heating degree days
- 474
- Cooling degree days
- 6
Oshkosh in November
Highs average 44°7° and lows 29°−2°, with 2.1 in52 mm of precipitation and 1.8 in4.6 cm of snow in a typical November.
- Record high
- 78°26° (1933)
- Record low
- −8°−22° (1950)
- Heating degree days
- 854
- Cooling degree days
- 0
Oshkosh in December
Highs average 32°0° and lows 18°−8°, with 1.6 in40 mm of precipitation and 10 in25 cm of snow in a typical December.
- Record high
- 65°18° (2001)
- Record low
- −27°−33° (1983)
- Heating degree days
- 1251
- Cooling degree days
- 0