Bison weather by month
What a typical year looks like in Bison, South Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Bison, 0 km from Bison; records cover 1916–2026.
The year at a glance
- Precipitation a year
- 18.1 in460 mm
- Snow a year
- 40 in101 cm
- Last spring freeze
- May 13
- First fall freeze
- Sep 30
- Heating degree days
- 7,613
- Cooling degree days
- 632
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −15°−26° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
Bison in January
Highs average 30°−1° and lows 10°−12°, with 0.46 in12 mm of precipitation and 6 in14 cm of snow in a typical January.
- Record high
- 71°22° (1935)
- Record low
- −34°−37° (1917)
- Heating degree days
- 1406
- Cooling degree days
- 0
Bison in February
Highs average 33°0° and lows 12°−11°, with 0.56 in14 mm of precipitation and 8 in20 cm of snow in a typical February.
- Record high
- 71°22° (1992)
- Record low
- −42°−41° (1939)
- Heating degree days
- 1187
- Cooling degree days
- 0
Bison in March
Highs average 45°7° and lows 22°−6°, with 0.87 in22 mm of precipitation and 7 in18 cm of snow in a typical March.
- Record high
- 81°27° (2015)
- Record low
- −28°−33° (1980)
- Heating degree days
- 978
- Cooling degree days
- 0
Bison in April
Highs average 57°14° and lows 32°0°, with 1.8 in45 mm of precipitation and 5 in14 cm of snow in a typical April.
- Record high
- 92°33° (1980)
- Record low
- −6°−21° (1936)
- Heating degree days
- 618
- Cooling degree days
- 1
Bison in May
Highs average 68°20° and lows 43°6°, with 3.1 in79 mm of precipitation and 0.7 in1.8 cm of snow in a typical May.
- Record high
- 102°39° (1934)
- Record low
- 11°−12° (1943)
- Heating degree days
- 312
- Cooling degree days
- 16
Bison in June
Highs average 78°26° and lows 52°11°, with 3.2 in80 mm of precipitation in a typical June.
- Record high
- 110°43° (2002)
- Record low
- 28°−2° (1917)
- Heating degree days
- 80
- Cooling degree days
- 85
Bison in July
Highs average 86°30° and lows 59°15°, with 2.5 in64 mm of precipitation in a typical July.
- Record high
- 111°44° (1936)
- Record low
- 37°3° (1945)
- Heating degree days
- 14
- Cooling degree days
- 243
Bison in August
Highs average 86°30° and lows 57°14°, with 1.8 in46 mm of precipitation in a typical August.
- Record high
- 107°42° (1960)
- Record low
- 33°1° (1950)
- Heating degree days
- 22
- Cooling degree days
- 217
Bison in September
Highs average 76°25° and lows 48°9°, with 1.4 in35 mm of precipitation in a typical September.
- Record high
- 107°42° (1960)
- Record low
- 18°−8° (1942)
- Heating degree days
- 158
- Cooling degree days
- 66
Bison in OctoberThis month
Highs average 60°15° and lows 35°2°, with 1.5 in39 mm of precipitation and 3 in8 cm of snow in a typical October.
- Record high
- 92°33° (1997)
- Record low
- −8°−22° (1919)
- Heating degree days
- 556
- Cooling degree days
- 4
Bison in November
Highs average 43°6° and lows 23°−5°, with 0.52 in13 mm of precipitation and 4 in10 cm of snow in a typical November.
- Record high
- 88°31° (1931)
- Record low
- −17°−27° (1940)
- Heating degree days
- 962
- Cooling degree days
- 0
Bison in December
Highs average 32°0° and lows 13°−11°, with 0.44 in11 mm of precipitation and 6 in15 cm of snow in a typical December.
- Record high
- 69°21° (1979)
- Record low
- −34°−37° (1983)
- Heating degree days
- 1320
- Cooling degree days
- 0