Bismark Lake Weather Forecast

    • 34
    • 48

    Mostly Sunny

    • 16
    • 48

    Breezy

    • 9
    • 24

    Blustery

    • 19
    • 31

    Mostly Sunny

    • 17
    • 41

    Mostly Sunny

    • 19
    • 34

    Partly Sunny

    • 21
    • 42

    Partly Sunny

Today 14 Jan Central Black Hills

Partly cloudy. Near steady temperature in the lower 40s. North Winds around 5 Mph with Gusts up to 20 Mph.

Tonight 14 Jan Central Black Hills

Clear. Lows in the mid 30s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bismark Lake Temperature Statistics

January Temperature

Custer, Custer County Airport (5.6 miles)

  • Lowest 9 January, 2026

    16 °F

  • Average January

    36.8 °F

  • Highest 1 January, 2026

    55.9 °F

Climate (2021–Present)

Custer, Custer County Airport (5.6 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45 °F

  • Average High 2021–2026

    56.3 °F
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