As of 14:52 MDT

Weather in Bison, SD

73°

Bison, Wednesday, 7 October, 14:52

Overcast. Feels like 72°. High 74°, low 45°.

Pressure30.03 inHg

Wind8.3 mph NE

Humidity30%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Monthly outlook for Bison, SD: average high 59.5°, average low 42.9°. That is 0.9° above the climate normal for October. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 9 October (81.2°), the coolest 17 October (33.2°).

59.5°/42.9°

Average high / low

+0.9°

Above normal

3 / 3

Wet days / normal

1.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
7 October – 16 October	62.6°	58.6°	+2.2°
17 October – 26 October	54.4°	56°	-0.9°
27 October – 5 November	at normal	49.5°	—

October records over 66 years

89.6°2 October 1997All-time high

-5.4°26 October 2020All-time low

Thu, 0871° / 44°

71 °

Bison, Thursday, 8 October

Overcast. High 71°, low 44°.

Pressure30.00 inHg

Wind9.4 mph S

Humidity39%

Visibility6.2 mi

Dew point40°

Fri, 0981° / 48°

81 °

Bison, Friday, 9 October

Overcast. High 81°, low 48°.

Pressure29.62 inHg

Wind11.5 mph S

Humidity52%

Visibility6.2 mi

Dew point55°

Sat, 1075° / 59°

75 °

Bison, Saturday, 10 October

Partly cloudy. High 75°, low 59°.

Pressure29.50 inHg

Wind11.3 mph NW

Humidity31%

Visibility6.2 mi

Dew point40°

Sun, 1151° / 43°

0.16

51 °

Bison, Sunday, 11 October

Light rain. High 51°, low 43°.

Pressure29.97 inHg

Wind13.3 mph N

Humidity94%

Visibility5.0 mi

Dew point43°

Mon, 1241° / 35°

0.74

41 °

Bison, Monday, 12 October

Snow. High 41°, low 35°.

Pressure30.21 inHg

Wind11.3 mph NE

Humidity92%

Visibility—

Dew point35°

Tue, 1371° / 35°

71 °

Bison, Tuesday, 13 October

Partly cloudy. High 71°, low 35°.

Pressure29.85 inHg

Wind20.4 mph S

Humidity59%

Visibility—

Dew point39°

Wed, 1466° / 56°

66 °

Bison, Wednesday, 14 October

Overcast. High 66°, low 56°.

Pressure29.53 inHg

Wind16.5 mph S

Humidity40%

Visibility—

Dew point39°

Thu, 1553° / 36°

0.02

53 °

Bison, Thursday, 15 October

Light rain. High 53°, low 36°.

Pressure30.09 inHg

Wind21.4 mph NW

Humidity58%

Visibility—

Dew point29°

Fri, 1644° / 35°

44 °

Bison, Friday, 16 October

Overcast. High 44°, low 35°.

Pressure30.68 inHg

Wind15.7 mph NW

Humidity50%

Visibility—

Dew point23°

Sat, 1754° / 33°

54 °

Bison, Saturday, 17 October

Clear. High 54°, low 33°.

Pressure30.39 inHg

Wind17.3 mph SE

Humidity40%

Visibility—

Dew point24°

Sun, 1860° / 45°

60 °

Bison, Sunday, 18 October

Overcast. High 60°, low 45°.

Pressure29.88 inHg

Wind26.3 mph SE

Humidity64%

Visibility—

Dew point38°

Mon, 1952° / 46°

52 °

Bison, Monday, 19 October

Overcast. High 52°, low 46°.

Pressure29.91 inHg

Wind24 mph W

Humidity68%

Visibility—

Dew point38°

Tue, 2056° / 43°

56 °

Bison, Tuesday, 20 October

Overcast. High 56°, low 43°.

Pressure30.24 inHg

Wind12.8 mph W

Humidity53%

Visibility—

Dew point35°

Wed, 2158° / 43°

58 °

Bison, Wednesday, 21 October

Overcast. High 58°, low 43°.

Pressure30.24 inHg

Wind6.8 mph NW

Humidity51%

Visibility—

Dew point35°

Thu, 2247° / 41°

0.26

47 °

Bison, Thursday, 22 October

Light rain. High 47°, low 41°.

Pressure30.03 inHg

Wind28.1 mph NW

Humidity81%

Visibility—

Dew point38°

From day 17 onward the outlook is built from 60-year climate statistics

Fri, 2354° / 36°

0.03

54 °

Bison, Friday, 23 October

Climate normal for this date — 60-year average.

Average high54°

Average low36°

Average precipitation0.03 in

Chance of precipitation15%

Record high80° (1973)

Record low8° (2020)

Sat, 2454° / 36°

0.02

54 °

Bison, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high54°

Average low36°

Average precipitation0.02 in

Chance of precipitation12%

Record high75° (1965)

Record low12° (2020)

Sun, 2555° / 36°

0.01

55 °

Bison, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high55°

Average low36°

Average precipitation0.01 in

Chance of precipitation7%

Record high74° (2017)

Record low8° (2020)

Mon, 2655° / 35°

0.04

55 °

Bison, Monday, 26 October

Climate normal for this date — 60-year average.

Average high55°

Average low35°

Average precipitation0.04 in

Chance of precipitation12%

Record high76° (1990)

Record low-5° (2020)

Tue, 2752° / 34°

0.04

52 °

Bison, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high52°

Average low34°

Average precipitation0.04 in

Chance of precipitation22%

Record high74° (1983)

Record low8° (2020)

Wed, 2852° / 34°

0.06

52 °

Bison, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high52°

Average low34°

Average precipitation0.06 in

Chance of precipitation18%

Record high77° (1985)

Record low12° (1991)

Thu, 2951° / 33°

0.1

51 °

Bison, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high51°

Average low33°

Average precipitation0.1 in

Chance of precipitation27%

Record high76° (1968)

Record low4° (1991)

Fri, 3049° / 32°

0.03

49 °

Bison, Friday, 30 October

Climate normal for this date — 60-year average.

Average high49°

Average low32°

Average precipitation0.03 in

Chance of precipitation18%

Record high76° (1968)

Record low-5° (1991)

Sat, 3149° / 32°

0.04

49 °

Bison, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high49°

Average low32°

Average precipitation0.04 in

Chance of precipitation7%

Record high74° (1990)

Record low-1° (1991)

Sun, 0149° / 32°

0.04

49 °

Bison, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high49°

Average low32°

Average precipitation0.04 in

Chance of precipitation10%

Record high72° (1965)

Record low3° (2002)

Mon, 0249° / 31°

0.02

49 °

Bison, Monday, 2 November

Climate normal for this date — 60-year average.

Average high49°

Average low31°

Average precipitation0.02 in

Chance of precipitation17%

Record high73° (2022)

Record low-3° (1991)

Tue, 0347° / 32°

0.02

47 °

Bison, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.02 in

Chance of precipitation13%

Record high68° (2020)

Record low-7° (1991)

Wed, 0449° / 30°

0.02

49 °

Bison, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high49°

Average low30°

Average precipitation0.02 in

Chance of precipitation13%

Record high74° (1978)

Record low-6° (1991)

Thu, 0548° / 30°

0.03

48 °

Bison, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.03 in

Chance of precipitation17%

Record high70° (2001)

Record low0° (2003)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Bison, SD are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Bison, SD since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.