Potosi weather by month
What a typical year looks like in Potosi, Missouri: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Potosi 4 SW, 7 km from Potosi; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 45.5 in1155 mm
- Snow a year
- 12 in29 cm
- Last spring freeze
- Apr 10
- First fall freeze
- Oct 29
- Heating degree days
- 4,898
- Cooling degree days
- 1,194
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 1°−17° (heating, 99%) and 96°36° (cooling, 1%).
Month by month
Potosi in January
Highs average 40°4° and lows 21°−6°, with 2.8 in72 mm of precipitation and 4 in9 cm of snow in a typical January.
- Record high
- 74°23° (1986)
- Record low
- −18°−28° (1985)
- Heating degree days
- 1069
- Cooling degree days
- 0
Potosi in February
Highs average 45°7° and lows 25°−4°, with 2.7 in68 mm of precipitation and 2.9 in7.4 cm of snow in a typical February.
- Record high
- 80°27° (1982)
- Record low
- −28°−33° (1899)
- Heating degree days
- 833
- Cooling degree days
- 0
Potosi in March
Highs average 55°13° and lows 34°1°, with 4.1 in104 mm of precipitation and 1.9 in4.8 cm of snow in a typical March.
- Record high
- 95°35° (2026)
- Record low
- −3°−19° (2002)
- Heating degree days
- 646
- Cooling degree days
- 4
Potosi in April
Highs average 66°19° and lows 44°7°, with 5.1 in130 mm of precipitation in a typical April.
- Record high
- 93°34° (1987)
- Record low
- 12°−11° (1899)
- Heating degree days
- 317
- Cooling degree days
- 26
Potosi in May
Highs average 74°23° and lows 54°12°, with 5.3 in134 mm of precipitation in a typical May.
- Record high
- 94°34° (1895)
- Record low
- 26°−3° (1895)
- Heating degree days
- 118
- Cooling degree days
- 89
Potosi in June
Highs average 82°28° and lows 63°17°, with 4.2 in105 mm of precipitation in a typical June.
- Record high
- 106°41° (2012)
- Record low
- 36°2° (1894)
- Heating degree days
- 14
- Cooling degree days
- 234
Potosi in July
Highs average 86°30° and lows 67°19°, with 3.6 in92 mm of precipitation in a typical July.
- Record high
- 112°44° (1901)
- Record low
- 42°6° (1898)
- Heating degree days
- 2
- Cooling degree days
- 354
Potosi in August
Highs average 85°30° and lows 65°18°, with 4 in102 mm of precipitation in a typical August.
- Record high
- 104°40° (1901)
- Record low
- 41°5° (1897)
- Heating degree days
- 4
- Cooling degree days
- 317
Potosi in September
Highs average 78°25° and lows 57°14°, with 3.9 in99 mm of precipitation in a typical September.
- Record high
- 101°38° (1899)
- Record low
- 16°−9° (1899)
- Heating degree days
- 68
- Cooling degree days
- 138
Potosi in OctoberThis month
Highs average 68°20° and lows 46°8°, with 3.1 in78 mm of precipitation in a typical October.
- Record high
- 92°33° (1901)
- Record low
- 11°−12° (1981)
- Heating degree days
- 283
- Cooling degree days
- 30
Potosi in November
Highs average 54°12° and lows 35°2°, with 3.7 in94 mm of precipitation and 0.7 in1.8 cm of snow in a typical November.
- Record high
- 84°29° (1989)
- Record low
- 0°−18° (1896)
- Heating degree days
- 611
- Cooling degree days
- 2
Potosi in December
Highs average 43°6° and lows 26°−3°, with 3 in75 mm of precipitation and 2.4 in6.1 cm of snow in a typical December.
- Record high
- 77°25° (2021)
- Record low
- −26°−32° (1901)
- Heating degree days
- 933
- Cooling degree days
- 0