As of 10:49 MDT

Bison, SD weather in September

68°

Bison, Wednesday, 7 October, 10:49

Overcast. Feels like 66°. High 71°, low 46°.

Pressure30.06 inHg

Wind5.7 mph N

Humidity39%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

In September, Bison, SD averages a high of 72.3° and a low of 51.2°. About 1.5 inches of precipitation fall over the month (6 wet days). The record high is 99.5° (1978) and the record low 18° (1984). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	79.2°	57.4°	13%	97.5° (2022)	42.4° (1965)
2	79.2°	58.1°	18%	98.4° (1960)	40.8° (1974)
3	79°	57.2°	17%	97° (2007)	42.3° (1962)
4	79°	57°	18%	99.3° (1960)	37.9° (1962)
5	78.6°	56.8°	22%	99.5° (1978)	35.4° (1965)
6	78.1°	55.6°	17%	99° (1976)	37.8° (2025)
7	76.6°	54.5°	17%	95.4° (2002)	36.7° (1986)
8	75.2°	54.1°	12%	91.6° (1994)	37.6° (2020)
9	75.4°	53.2°	18%	93.9° (1979)	33.4° (2020)
10	75.9°	53.6°	18%	93.7° (2021)	36.1° (1962)
11	73.8°	53.4°	18%	91.6° (1990)	33.4° (1989)
12	73°	52.9°	22%	93.2° (1990)	30.2° (2014)
13	70.3°	50.9°	20%	90.9° (2015)	34.3° (1970)
14	70.5°	50.2°	25%	87.4° (1968)	31.3° (1993)
15	71.8°	51.3°	28%	90° (2015)	35.4° (1961)
16	72°	50.9°	12%	91.4° (2007)	33.6° (1965)
17	71.4°	50.7°	23%	92.1° (1989)	30° (1965)
18	70.5°	50.5°	27%	90.5° (1998)	31.8° (1971)
19	69.6°	49.8°	27%	91° (1972)	29.7° (1991)
20	67.8°	48.6°	20%	91.2° (1960)	31.3° (1983)
21	66°	47.3°	20%	82.6° (2015)	27.5° (1995)
22	66.7°	45.9°	17%	89.8° (2013)	28.4° (1983)
23	67.5°	46.4°	28%	88° (1992)	26.4° (1965)
24	69.1°	46.6°	18%	91.4° (1992)	28.8° (1984)
25	69.3°	47.5°	18%	85.8° (1974)	23.2° (1984)
26	70.3°	48.2°	10%	94.1° (2024)	18.7° (1984)
27	67.5°	47.3°	18%	85.8° (2021)	28.8° (1984)
28	68.4°	46.2°	12%	90.9° (2021)	18° (1984)
29	68.4°	47.3°	13%	94.6° (2024)	24.8° (1984)
30	69.3°	47.5°	15%	91.4° (1989)	27.5° (1985)