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Current weather in Bison is broken clouds.

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Weather data for Bison is updated regularly with the latest available observations and forecasts.

Now · 12:18 AM

Bison Weather & Hourly Forecast

United States · South Dakota · 57620

75°F

Mostly cloudy night

Feels like: 76°F

💧 Humidity 51% 🌡 Pressure 29.83 inHg 💨 Wind 2 mph 👁 Visibility 31.9 mi ☁ Clouds 87% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Bison

Today

1:00 AM

Mostly clear night

74° 💧 None 💨 2 mph H 51%29.83 inHg

4:00 AM

Mostly clear night

71° 💧 None 💨 1 mph H 61%29.83 inHg

7:00 AM

Sunny

69° 💧 None 💨 2 mph H 68%29.83 inHg

10:00 AM

Sunny

82° 💧 None 💨 12 mph H 60%29.83 inHg

1:00 PM

Sunny

90° 💧 None 💨 14 mph H 45%29.80 inHg

4:00 PM

Strong thunderstorm

88° 💧 0.008 in 💨 6 mph H 40%29.77 inHg

7:00 PM

Mostly cloudy

74° 💧 0.000 in 💨 13 mph H 73%29.80 inHg

10:00 PM

Mostly cloudy night

71° 💧 None 💨 15 mph H 84%29.83 inHg

Tomorrow

1:00 AM

Mostly cloudy night

69° 💧 None 💨 11 mph H 92%29.77 inHg

4:00 AM

Overcast night

68° 💧 0.001 in 💨 7 mph H 97%29.74 inHg

7:00 AM

Light thunderstorms

68° 💧 0.146 in 💨 12 mph H 98%29.71 inHg

10:00 AM

Light rain

73° 💧 0.009 in 💨 9 mph H 86%29.71 inHg

1:00 PM

Mostly sunny

87° 💧 None 💨 15 mph H 39%29.62 inHg

4:00 PM

Sunny

92° 💧 None 💨 13 mph H 24%29.56 inHg

7:00 PM

Sunny

83° 💧 None 💨 7 mph H 35%29.59 inHg

10:00 PM

Mostly clear night

75° 💧 None 💨 9 mph H 44%29.71 inHg

Today

1:00 AM

Mostly clear night

74° 💧 None 💨 2 mph H 51%29.83 inHg

2:00 AM

Clear night

73° 💧 None 💨 2 mph H 51%29.83 inHg

3:00 AM

Clear night

72° 💧 None 💨 1 mph H 54%29.83 inHg

4:00 AM

Mostly clear night

71° 💧 None 💨 1 mph H 61%29.83 inHg

5:00 AM

Mostly clear night

70° 💧 None 💨 3 mph H 63%29.83 inHg

6:00 AM

Clear night

68° 💧 None 💨 1 mph H 64%29.83 inHg

7:00 AM

Sunny

69° 💧 None 💨 2 mph H 68%29.83 inHg

8:00 AM

Sunny

74° 💧 None 💨 10 mph H 70%29.85 inHg

9:00 AM

Sunny

78° 💧 None 💨 10 mph H 71%29.85 inHg

10:00 AM

Sunny

82° 💧 None 💨 12 mph H 60%29.83 inHg

11:00 AM

Sunny

85° 💧 None 💨 13 mph H 53%29.83 inHg

12:00 PM

Sunny

88° 💧 None 💨 15 mph H 48%29.80 inHg

1:00 PM

Sunny

90° 💧 None 💨 14 mph H 45%29.80 inHg

2:00 PM

Sunny

91° 💧 None 💨 14 mph H 43%29.77 inHg

3:00 PM

Strong thunderstorm

91° 💧 None 💨 11 mph H 41%29.74 inHg

4:00 PM

Strong thunderstorm

88° 💧 None 💨 6 mph H 40%29.77 inHg

5:00 PM

Light thunderstorms

85° 💧 0.004 in 💨 11 mph H 49%29.77 inHg

6:00 PM

Light rain

77° 💧 0.004 in 💨 17 mph H 67%29.80 inHg

7:00 PM

Mostly cloudy

74° 💧 0.000 in 💨 13 mph H 73%29.80 inHg

8:00 PM

Overcast night

73° 💧 None 💨 12 mph H 76%29.80 inHg

9:00 PM

Mostly cloudy night

72° 💧 None 💨 15 mph H 82%29.83 inHg

10:00 PM

Mostly cloudy night

71° 💧 None 💨 15 mph H 84%29.83 inHg

11:00 PM

Partly cloudy night

70° 💧 None 💨 12 mph H 84%29.83 inHg

Tomorrow

12:00 AM

Mostly cloudy night

69° 💧 None 💨 10 mph H 88%29.80 inHg

1:00 AM

Mostly cloudy night

69° 💧 None 💨 11 mph H 92%29.77 inHg

2:00 AM

Mostly cloudy night

69° 💧 None 💨 10 mph H 96%29.77 inHg

3:00 AM

Overcast night

68° 💧 None 💨 8 mph H 97%29.77 inHg

4:00 AM

Overcast night

68° 💧 0.001 in 💨 7 mph H 97%29.74 inHg

5:00 AM

Overcast night

68° 💧 None 💨 8 mph H 98%29.71 inHg

6:00 AM

Overcast night

68° 💧 None 💨 10 mph H 99%29.71 inHg

7:00 AM

Light thunderstorms

68° 💧 0.027 in 💨 12 mph H 98%29.71 inHg

8:00 AM

Light thunderstorms

68° 💧 0.089 in 💨 7 mph H 96%29.77 inHg

9:00 AM

Light thunderstorms

70° 💧 0.030 in 💨 8 mph H 94%29.74 inHg

10:00 AM

Light rain

73° 💧 0.006 in 💨 9 mph H 86%29.71 inHg

11:00 AM

Partly cloudy

78° 💧 0.001 in 💨 10 mph H 68%29.65 inHg

12:00 PM

Partly cloudy

83° 💧 0.001 in 💨 13 mph H 51%29.65 inHg

1:00 PM

Mostly sunny

87° 💧 None 💨 15 mph H 39%29.62 inHg

2:00 PM

Sunny

89° 💧 None 💨 15 mph H 34%29.59 inHg

3:00 PM

Sunny

90° 💧 None 💨 14 mph H 30%29.56 inHg

4:00 PM

Sunny

92° 💧 None 💨 13 mph H 24%29.56 inHg

5:00 PM

Mostly sunny

91° 💧 None 💨 10 mph H 25%29.56 inHg

6:00 PM

Sunny

87° 💧 None 💨 10 mph H 30%29.56 inHg

7:00 PM

Sunny

83° 💧 None 💨 7 mph H 35%29.59 inHg

8:00 PM

Clear night

79° 💧 None 💨 11 mph H 40%29.65 inHg

9:00 PM

Clear night

76° 💧 None 💨 8 mph H 45%29.68 inHg

10:00 PM

Mostly clear night

75° 💧 None 💨 9 mph H 44%29.71 inHg

11:00 PM

Clear night

73° 💧 None 💨 8 mph H 46%29.74 inHg

Tuesday

12:00 AM

Clear night

71° 💧 None 💨 8 mph H 51%29.74 inHg

1:00 AM

Clear night

69° 💧 None 💨 8 mph H 56%29.74 inHg

2:00 AM

Clear night

68° 💧 None 💨 9 mph H 56%29.77 inHg

3:00 AM

Clear night

66° 💧 None 💨 8 mph H 50%29.80 inHg

4:00 AM

Clear night

64° 💧 None 💨 6 mph H 52%29.83 inHg

5:00 AM

Clear night

62° 💧 None 💨 5 mph H 57%29.83 inHg

6:00 AM

Clear night

61° 💧 None 💨 6 mph H 59%29.85 inHg

3:00 PM

Sunny

80° 💧 None 💨 20 mph H 19%29.88 inHg

6:00 PM

Sunny

78° 💧 None 💨 19 mph H 19%29.91 inHg

9:00 PM

Clear night

68° 💧 None 💨 18 mph H 36%30.00 inHg

Wednesday

12:00 AM

Clear night

61° 💧 None 💨 21 mph H 61%30.09 inHg

3:00 AM

Clear night

58° 💧 None 💨 15 mph H 75%30.15 inHg

6:00 AM

Clear night

57° 💧 None 💨 13 mph H 79%30.18 inHg

9:00 AM

Sunny

63° 💧 None 💨 15 mph H 61%30.18 inHg

12:00 PM

Sunny

72° 💧 None 💨 14 mph H 39%30.15 inHg

3:00 PM

Sunny

77° 💧 None 💨 13 mph H 28%30.06 inHg

6:00 PM

Sunny

76° 💧 None 💨 9 mph H 26%30.03 inHg

9:00 PM

Clear night

66° 💧 None 💨 3 mph H 41%30.03 inHg

Thursday

12:00 AM

Clear night

62° 💧 None 💨 2 mph H 49%30.00 inHg

3:00 AM

Clear night

61° 💧 None 💨 9 mph H 48%29.97 inHg

6:00 AM

Clear night

60° 💧 None 💨 10 mph H 53%29.91 inHg

9:00 AM

Sunny

71° 💧 None 💨 8 mph H 37%29.88 inHg

12:00 PM

Sunny

85° 💧 None 💨 9 mph H 20%29.80 inHg

3:00 PM

Sunny

89° 💧 None 💨 8 mph H 14%29.71 inHg

6:00 PM

Sunny

85° 💧 None 💨 3 mph H 22%29.65 inHg

9:00 PM

Clear night

71° 💧 None 💨 4 mph H 25%29.68 inHg

Friday

12:00 AM

Clear night

66° 💧 None 💨 2 mph H 29%29.68 inHg

3:00 AM

Clear night

63° 💧 None 💨 2 mph H 33%29.65 inHg

6:00 AM

Clear night

58° 💧 None 💨 4 mph H 39%29.68 inHg

9:00 AM

Sunny

68° 💧 None 💨 10 mph H 39%29.68 inHg

12:00 PM

Mostly sunny

78° 💧 None 💨 12 mph H 28%29.65 inHg

6:00 PM

Sunny

85° 💧 None 💨 3 mph H 17%29.71 inHg

Saturday

12:00 AM

Clear night

86° 💧 None 💨 2 mph H 28%29.53 inHg

6:00 AM

Clear night

66° 💧 None 💨 15 mph H 58%29.50 inHg

12:00 PM

Partly cloudy

54° 💧 None 💨 22 mph H 81%29.71 inHg

6:00 PM

Mostly cloudy

63° 💧 None 💨 20 mph H 44%29.83 inHg

Sunday

12:00 AM

Mostly clear night

62° 💧 None 💨 16 mph H 40%29.91 inHg

6:00 AM

Mostly clear night

53° 💧 None 💨 7 mph H 58%30.06 inHg

12:00 PM

Mostly sunny

47° 💧 None 💨 6 mph H 73%30.18 inHg

6:00 PM

Overcast

61° 💧 None 💨 10 mph H 39%30.24 inHg

Monday

12:00 AM

Clear night

64° 💧 None 💨 8 mph H 30%30.12 inHg

6:00 AM

Clear night

54° 💧 None 💨 8 mph H 46%30.12 inHg

12:00 PM

Sunny

49° 💧 None 💨 8 mph H 69%30.09 inHg

6:00 PM

Sunny

71° 💧 None 💨 1 mph H 32%30.00 inHg

Tuesday

12:00 AM

Clear night

75° 💧 None 💨 2 mph H 25%29.94 inHg

6:00 AM

Clear night

56° 💧 None 💨 4 mph H 51%30.00 inHg

12:00 PM

Sunny

50° 💧 None 💨 4 mph H 62%30.06 inHg

6:00 PM

Sunny

75° 💧 None 💨 7 mph H 26%30.06 inHg

Wednesday

12:00 AM

Clear night

77° 💧 None 💨 7 mph H 23%30.00 inHg

6:00 AM

Partly cloudy night

63° 💧 None 💨 9 mph H 43%30.09 inHg

12:00 PM

Sunny

57° 💧 None 💨 7 mph H 55%30.12 inHg

6:00 PM

Mostly sunny

78° 💧 None 💨 10 mph H 35%30.15 inHg

Thursday

12:00 AM

Partly cloudy night

80° 💧 None 💨 9 mph H 33%30.09 inHg

6:00 AM

Light rain

63° 💧 None 💨 12 mph H 82%30.18 inHg

12:00 PM

Moderate rain

61° 💧 None 💨 10 mph H 96%30.18 inHg

6:00 PM

Mostly sunny

72° 💧 None 💨 13 mph H 75%30.09 inHg

Friday

12:00 AM

Partly cloudy night

76° 💧 None 💨 7 mph H 64%30.03 inHg

6:00 AM

Partly cloudy night

62° 💧 None 💨 5 mph H 98%30.09 inHg

12:00 PM

Overcast

60° 💧 None 💨 9 mph H 99%30.06 inHg

6:00 PM

Light rain

68° 💧 None 💨 7 mph H 73%30.06 inHg

Saturday

12:00 AM

Partly cloudy night

68° 💧 None 💨 8 mph H 67%30.03 inHg

6:00 AM

Overcast night

60° 💧 None 💨 5 mph H 86%30.06 inHg

12:00 PM

Light rain

57° 💧 None 💨 2 mph H 97%30.03 inHg

6:00 PM

Partly cloudy

63° 💧 None 💨 7 mph H 77%30.00 inHg

Sunday

12:00 AM

Mostly clear night

62° 💧 None 💨 12 mph H 78%29.97 inHg

6:00 AM

Clear night

48° 💧 None 💨 5 mph H 92%30.21 inHg

12:00 PM

Sunny

44° 💧 None 💨 3 mph H 99%30.27 inHg

In Bison and, more broadly, across the state of South Dakota: Clear skies will persist through the evening, with temperatures remaining quite warm between 84 and 87 degrees Fahrenheit. Expect moderate southeast winds at around 10 mph, with gusts reaching up to 17 mph. A brief chance of rain exists, with a small accumulation of approximately 0.04 inches possible, and the likelihood of rain reaching nearly 100 percent. Overall, it will stay warm and mostly dry tonight, with occasional breezes from the southeast.

15-Day Weather Outlook for Bison

TomorrowTomorrow

Light thunderstorms 92°/68° 💧 None 💨 17 mph

Tuesday, Sep 8Tue Sep 8

Mostly sunny 87°/61° 💧 0.064 in 💨 20 mph

Wednesday, Sep 9Wed Sep 9

Sunny 78°/57° 💧 0.000 in 💨 21 mph

Thursday, Sep 10Thu Sep 10

Sunny 89°/60° 💧 None 💨 10 mph

Friday, Sep 11Fri Sep 11

Mostly sunny 85°/58° 💧 None 💨 12 mph

Saturday, Sep 12Sat Sep 12

Partly cloudy 86°/54° 💧 0.112 in 💨 22 mph

Sunday, Sep 13Sun Sep 13

Mostly cloudy 63°/47° 💧 None 💨 20 mph

Monday, Sep 14Mon Sep 14

Overcast 64°/49° 💧 None 💨 10 mph

Tuesday, Sep 15Tue Sep 15

Sunny 75°/50° 💧 None 💨 4 mph

Wednesday, Sep 16Wed Sep 16

Partly cloudy 77°/57° 💧 None 💨 9 mph

Thursday, Sep 17Thu Sep 17

Moderate rain 80°/61° 💧 0.153 in 💨 12 mph

Friday, Sep 18Fri Sep 18

Mostly sunny 76°/60° 💧 0.717 in 💨 13 mph

Saturday, Sep 19Sat Sep 19

Light rain 68°/57° 💧 0.048 in 💨 8 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 63°/44° 💧 0.296 in 💨 12 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Bison

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Bison

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 1:00 AM

PM2.5 Fine particles Good 3,5µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 4,9µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 57,8µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 2,4µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Bison

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 7,2High 😊Good

Tomorrow UV 5,1Moderate 🙂Fair

Tuesday UV 6,2High 😐Moderate

Wednesday UV 5,7Moderate 🙂Fair

Thursday UV 8,0Very high —Unavailable

Friday UV 6,0High —Unavailable

Saturday UV 5,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,1 8:00 AMUV 0,7 9:00 AMUV 1,9 10:00 AMUV 3,6 11:00 AMUV 5,4 12:00 PMUV 6,8 1:00 PMUV 7,2 2:00 PMUV 6,4 3:00 PMUV 4,9 4:00 PMUV 3,1 5:00 PMUV 1,4 6:00 PMUV 0,4

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Bison

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · BISON, SOUTH DAKOTA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 2:00 AM–3:00 AM.

96/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 9:05 PM–4:33 AM

☁ Cloud cover 4% Real hourly forecast for the best viewing hour.

☾ Moonlight 31% Waning Crescent · Moon about 12° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 57° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min67%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Bison were last refreshed today at 12:03 AM. The current forecast period extends through 07/09/2026 at 10:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.