Sylvan Lake Weather Forecast

    • 26
    • 44

    Mostly Sunny

    • 25
    • 47

    Mostly Sunny

    • 28
    • 46

    Partly Sunny

    • 30
    • 49

    Mostly Cloudy

    • 33
    • 50

    Slight Chance Rain/Snow

    • 24
    • 45

    Chance Snow

Today 12 Feb Central Black Hills

Sunny. Highs in the upper 40s. West Winds 5 to 10 Mph.

Tonight 12 Feb Central Black Hills

Clear. Lows in the mid 20s. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sylvan Lake Temperature Statistics

February Temperature

Custer, Custer County Airport (8.1 miles)

  • Lowest 4 February, 2026

    22.6 °F

  • Average February

    40.7 °F

  • Highest 5 February, 2026

    61.6 °F

Climate (2021–Present)

Custer, Custer County Airport (8.1 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45.1 °F

  • Average High 2021–2026

    56.5 °F
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