Bismark Lake Weather Forecast

    • 41
    • 60

    Gradual Clearing

    • 42
    • 60

    Rain Likely

    • 37
    • 48

    Rain Likely

    • 36
    • 52

    Mostly Sunny

    • 33
    • 53

    Partly Sunny

    • 34
    • 47

    Partly Sunny

Today 31 Oct Central Black Hills

Becoming mostly cloudy. Patchy fog in the morning. Highs in the upper 50s. South Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 31 Oct Central Black Hills

Partly cloudy in the Evening, then clearing. Lows in the lower 40s. Southwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Bismark Lake Temperature Statistics

October Temperature

Custer, Custer County Airport (5.6 miles)

  • Lowest 16 October, 2026

    26.7 °F

  • Average October

    50.5 °F

  • Highest 5 October, 2026

    81.6 °F

Climate (2021–2026)

Custer, Custer County Airport (5.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    33.6 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
Get WillyWeather+ to remove ads