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As of 14:37 MDT

Weather in Bison, SD

95°Current weather

Bison, Saturday, 8 August, 14:37

Clear. Feels like 91°. High 96°, low 61°.

Pressure29.71 inHg
Wind11.5 mph W
Humidity20%
Visibility6.2 mi
Dew point48°
Sun, 0990° / 61°0Overcast
90 °Overcast

Bison, Sunday, 9 August

Overcast. High 90°, low 61°.

Pressure29.83 inHg
Wind14.6 mph E
Humidity27%
Visibility6.2 mi
Dew point48°
Mon, 1097° / 65°0.05Light rain
97 °Light rain

Bison, Monday, 10 August

Light rain. High 97°, low 65°.

Pressure29.77 inHg
Wind5.8 mph SE
Humidity30%
Visibility6.2 mi
Dew point55°
Tue, 1191° / 63°0Mostly clear
91 °Mostly clear

Bison, Tuesday, 11 August

Mostly clear. High 91°, low 63°.

Pressure29.85 inHg
Wind10.6 mph E
Humidity31%
Visibility6.2 mi
Dew point52°
Wed, 1289° / 65°0.51Rain
89 °Rain

Bison, Wednesday, 12 August

Rain. High 89°, low 65°.

Pressure29.80 inHg
Wind11.2 mph E
Humidity32%
Visibility6.2 mi
Dew point54°
Thu, 1379° / 58°0Overcast
79 °Overcast

Bison, Thursday, 13 August

Overcast. High 79°, low 58°.

Pressure30.09 inHg
Wind15.6 mph SE
Humidity41%
Visibility—
Dew point46°
Fri, 1492° / 64°0.17Rain
92 °Rain

Bison, Friday, 14 August

Rain. High 92°, low 64°.

Pressure29.91 inHg
Wind24.4 mph SE
Humidity40%
Visibility—
Dew point55°
Sat, 1588° / 66°0.01Light rain
88 °Light rain

Bison, Saturday, 15 August

Light rain. High 88°, low 66°.

Pressure30.00 inHg
Wind13.6 mph S
Humidity42%
Visibility—
Dew point55°
Sun, 1692° / 69°0.04Light rain
92 °Light rain

Bison, Sunday, 16 August

Light rain. High 92°, low 69°.

Pressure29.94 inHg
Wind10.1 mph NW
Humidity35%
Visibility—
Dew point53°
Mon, 1794° / 68°0.04Light rain
94 °Light rain

Bison, Monday, 17 August

Light rain. High 94°, low 68°.

Pressure29.97 inHg
Wind15.2 mph SE
Humidity33%
Visibility—
Dew point54°
Tue, 1893° / 69°0.01Light rain
93 °Light rain

Bison, Tuesday, 18 August

Light rain. High 93°, low 69°.

Pressure29.94 inHg
Wind12.4 mph SE
Humidity17%
Visibility—
Dew point37°
Wed, 1980° / 67°0.2Rain
80 °Rain

Bison, Wednesday, 19 August

Rain. High 80°, low 67°.

Pressure30.00 inHg
Wind18.4 mph E
Humidity54%
Visibility—
Dew point55°
Thu, 2083° / 65°0Overcast
83 °Overcast

Bison, Thursday, 20 August

Overcast. High 83°, low 65°.

Pressure30.00 inHg
Wind10.8 mph E
Humidity42%
Visibility—
Dew point52°
Fri, 2196° / 68°0Clear
96 °Clear

Bison, Friday, 21 August

Clear. High 96°, low 68°.

Pressure29.83 inHg
Wind16.3 mph N
Humidity30%
Visibility—
Dew point51°
Sat, 2275° / 54°0Overcast
75 °Overcast

Bison, Saturday, 22 August

Overcast. High 75°, low 54°.

Pressure30.15 inHg
Wind19.6 mph NE
Humidity42%
Visibility—
Dew point43°
Sun, 2386° / 58°0Mostly clear
86 °Mostly clear

Bison, Sunday, 23 August

Mostly clear. High 86°, low 58°.

Pressure30.06 inHg
Wind13 mph SE
Humidity41%
Visibility—
Dew point50°

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.