Potosi weather by month
What a typical year looks like in Potosi, Wisconsin: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Lancaster 4 Wsw, 17 km from Potosi; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 38.5 in978 mm
- Snow a year
- 37 in95 cm
- Last spring freeze
- Apr 24
- First fall freeze
- Oct 10
- Heating degree days
- 7,364
- Cooling degree days
- 599
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 90°32° (cooling, 1%).
Month by month
Potosi in January
Highs average 25°−4° and lows 9°−13°, with 1.2 in30 mm of precipitation and 10 in25 cm of snow in a typical January.
- Record high
- 60°16° (1897)
- Record low
- −31°−35° (1963)
- Heating degree days
- 1485
- Cooling degree days
- 0
Potosi in February
Highs average 30°−1° and lows 13°−11°, with 1.3 in33 mm of precipitation and 9 in23 cm of snow in a typical February.
- Record high
- 71°22° (2024)
- Record low
- −31°−35° (1996)
- Heating degree days
- 1221
- Cooling degree days
- 0
Potosi in March
Highs average 43°6° and lows 25°−4°, with 2 in51 mm of precipitation and 5 in12 cm of snow in a typical March.
- Record high
- 84°29° (1986)
- Record low
- −22°−30° (1962)
- Heating degree days
- 966
- Cooling degree days
- 1
Potosi in April
Highs average 57°14° and lows 37°3°, with 3.8 in97 mm of precipitation and 1.6 in4.1 cm of snow in a typical April.
- Record high
- 95°35° (1980)
- Record low
- 6°−14° (1982)
- Heating degree days
- 554
- Cooling degree days
- 2
Potosi in May
Highs average 68°20° and lows 48°9°, with 4.4 in112 mm of precipitation and 0.2 in0.5 cm of snow in a typical May.
- Record high
- 104°40° (1934)
- Record low
- 23°−5° (1908)
- Heating degree days
- 248
- Cooling degree days
- 34
Potosi in June
Highs average 77°25° and lows 58°15°, with 5.9 in151 mm of precipitation in a typical June.
- Record high
- 100°38° (1931)
- Record low
- 35°2° (1897)
- Heating degree days
- 46
- Cooling degree days
- 130
Potosi in July
Highs average 81°27° and lows 62°17°, with 5 in128 mm of precipitation in a typical July.
- Record high
- 108°42° (1936)
- Record low
- 42°6° (1901)
- Heating degree days
- 11
- Cooling degree days
- 208
Potosi in August
Highs average 79°26° and lows 60°15°, with 3.9 in98 mm of precipitation in a typical August.
- Record high
- 103°39° (1930)
- Record low
- 34°1° (1915)
- Heating degree days
- 22
- Cooling degree days
- 160
Potosi in September
Highs average 72°22° and lows 52°11°, with 4 in102 mm of precipitation in a typical September.
- Record high
- 100°38° (1939)
- Record low
- 20°−7° (1899)
- Heating degree days
- 151
- Cooling degree days
- 58
Potosi in OctoberThis month
Highs average 59°15° and lows 39°4°, with 2.9 in74 mm of precipitation and 0.5 in1.3 cm of snow in a typical October.
- Record high
- 92°33° (1963)
- Record low
- 3°−16° (1925)
- Heating degree days
- 494
- Cooling degree days
- 6
Potosi in November
Highs average 44°7° and lows 28°−2°, with 2.4 in60 mm of precipitation and 2.6 in6.6 cm of snow in a typical November.
- Record high
- 77°25° (1915)
- Record low
- −15°−26° (1977)
- Heating degree days
- 880
- Cooling degree days
- 0
Potosi in December
Highs average 31°−1° and lows 16°−9°, with 1.7 in43 mm of precipitation and 9 in22 cm of snow in a typical December.
- Record high
- 68°20° (2021)
- Record low
- −27°−33° (1983)
- Heating degree days
- 1286
- Cooling degree days
- 0