Bison, SD Weather

Bison, SD climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 20's.

The warmest month of the year is August with an average maximum temperature of 86.20 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 6.80 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 28 degrees Fahrenheit, and moderate during winter with an average difference of 21 degrees Fahrenheit.

The annual average precipitation at Bison is 17.26 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is June with an average rainfall of 2.82 Inches.

Weather Data

Current Conditions

(Updated: 7:53 AM MST SUN NOV 23 2008)

Fair, 29°F	Humidity: 85%	Dewpoint: 25°F
	Wind Speed: NW 7 MPH	Heat Index: 29°F
	Barometer: 30.06 in.	Wind Chill: 22°F

Weather Forecast

(Generated: 3:09 AM MST SUN NOV 23 2008)

	Hi: 39°F	Today: Mostly cloudy with a 20 percent chance of rain showers or snow showers in the morning...Then partly cloudy in the afternoon. Highs in the upper 30s. Northwest winds 5 to 15 mph increasing to 15 to 20 mph in the afternoon.
	Lo: 20°F
	Hi: 40°F	Monday: Mostly sunny. Highs around 40. Northwest winds 5 to 15 mph.
	Lo: 18°F
	Hi: 45°F	Tuesday: Mostly sunny. Highs in the mid 40s. Southeast winds 5 to 10 mph.
	Lo: 25°F
	Hi: 45°F	Wednesday: Mostly sunny. Highs in the mid 40s.
	Lo: 21°F
	Hi: 39°F	Thanksgiving day: Partly cloudy with a 20 percent chance of snow. Highs in the upper 30s.
	Lo: 21°F
	Hi: 35°F	Friday: Breezy. Partly cloudy. Highs in the mid 30s.
	Lo: 19°F

Moon, Sunrise and Sunset

	Moon Phase: Waning Crescent Moon	Civil Twilight: 6:26 AM MST	Sunrise: 6:59 AM MST
		Sunset: 4:12 PM MST	Civil Twilight: 4:45 PM MST

Normal Climate

Normal Temperatures

(BISON Weather station, 0.80 miles from Bison)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	27.5	34.0	43.7	57.7	69.5	78.9	86.0	86.2	74.8	60.5	41.3	30.9	57.6
Mean °F	17.2	23.7	32.7	45.2	56.6	66.0	72.2	71.6	60.7	47.9	31.3	20.7	45.5
Min °F	6.8	13.4	21.6	32.6	43.7	53.0	58.4	56.9	46.5	35.3	21.2	10.5	33.3

Normal Precipitation