Princeton weather by month
What a typical year looks like in Princeton, Wisconsin: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Montello Wwtp, 18 km from Princeton; records cover 1954–2026.
The year at a glance
- Precipitation a year
- 36.3 in921 mm
- Snow a year
- 42 in107 cm
- Last spring freeze
- May 4
- First fall freeze
- Oct 3
- Heating degree days
- 7,571
- Cooling degree days
- 541
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −13°−25° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Princeton in January
Highs average 26°−3° and lows 8°−13°, with 1.4 in35 mm of precipitation and 11 in28 cm of snow in a typical January.
- Record high
- 56°13° (2002)
- Record low
- −35°−37° (1963)
- Heating degree days
- 1485
- Cooling degree days
- 0
Princeton in February
Highs average 31°−1° and lows 11°−12°, with 1.3 in33 mm of precipitation and 10 in25 cm of snow in a typical February.
- Record high
- 72°22° (2024)
- Record low
- −33°−36° (1996)
- Heating degree days
- 1230
- Cooling degree days
- 0
Princeton in March
Highs average 43°6° and lows 22°−5°, with 1.9 in49 mm of precipitation and 6 in15 cm of snow in a typical March.
- Record high
- 84°29° (1986)
- Record low
- −30°−34° (1962)
- Heating degree days
- 1008
- Cooling degree days
- 0
Princeton in April
Highs average 56°13° and lows 34°1°, with 3.7 in94 mm of precipitation and 2.4 in6.1 cm of snow in a typical April.
- Record high
- 92°33° (1980)
- Record low
- 10°−12° (1972)
- Heating degree days
- 604
- Cooling degree days
- 3
Princeton in May
Highs average 69°20° and lows 46°8°, with 4.4 in113 mm of precipitation in a typical May.
- Record high
- 95°35° (2018)
- Record low
- 22°−6° (1966)
- Heating degree days
- 270
- Cooling degree days
- 33
Princeton in June
Highs average 78°25° and lows 56°13°, with 5 in126 mm of precipitation in a typical June.
- Record high
- 102°39° (1988)
- Record low
- 31°−1° (1972)
- Heating degree days
- 60
- Cooling degree days
- 114
Princeton in July
Highs average 82°28° and lows 60°16°, with 4.4 in111 mm of precipitation in a typical July.
- Record high
- 104°40° (1995)
- Record low
- 40°4° (1965)
- Heating degree days
- 15
- Cooling degree days
- 193
Princeton in August
Highs average 80°26° and lows 58°14°, with 4.1 in105 mm of precipitation in a typical August.
- Record high
- 103°39° (1988)
- Record low
- 35°2° (1958)
- Heating degree days
- 28
- Cooling degree days
- 146
Princeton in September
Highs average 72°22° and lows 49°10°, with 3.5 in89 mm of precipitation in a typical September.
- Record high
- 98°37° (2023)
- Record low
- 25°−4° (1964)
- Heating degree days
- 172
- Cooling degree days
- 48
Princeton in OctoberThis month
Highs average 59°15° and lows 38°3°, with 2.9 in72 mm of precipitation and 0.3 in0.8 cm of snow in a typical October.
- Record high
- 88°31° (2025)
- Record low
- 11°−12° (1982)
- Heating degree days
- 515
- Cooling degree days
- 4
Princeton in November
Highs average 44°7° and lows 26°−3°, with 2.1 in53 mm of precipitation and 1.7 in4.3 cm of snow in a typical November.
- Record high
- 76°24° (1999)
- Record low
- −12°−24° (1976)
- Heating degree days
- 891
- Cooling degree days
- 0
Princeton in December
Highs average 32°0° and lows 15°−9°, with 1.7 in42 mm of precipitation and 11 in27 cm of snow in a typical December.
- Record high
- 65°18° (1998)
- Record low
- −34°−37° (1983)
- Heating degree days
- 1293
- Cooling degree days
- 0