Legion Lake Weather Forecast

    • 14
    • 32

    Partly Sunny

    • -8
    • 23

    Chance Snow

    • -6
    • 2

    Snow Likely

    • -1
    • 17

    Partly Sunny

    • 1
    • 17

    Partly Sunny

    • 22
    • 37

    Partly Sunny

    • 21
    • 40

    Partly Sunny

Today 21 Jan Central Black Hills

Mostly sunny. Highs in the 20s to lower 30s. Northwest Winds 10 to 15 Mph with Gusts up to 45 Mph.

Tonight 21 Jan Central Black Hills

Mostly clear. Not as cool with Lows around 10. Northwest Winds 5 to 10 Mph with Gusts up to 35 Mph. Wind chill Values near zero.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Legion Lake Temperature Statistics

January Temperature

Custer, Custer County Airport (7.5 miles)

  • Lowest 17 January, 2026

    0 °F

  • Average January

    33.1 °F

  • Highest 1 January, 2026

    55.9 °F

Climate (2021–Present)

Custer, Custer County Airport (7.5 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    45 °F

  • Average High 2021–2026

    56.3 °F
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