Sylvan Lake Weather Forecast

    • 29
    • 45

    Snow

    • 28
    • 35

    Snow

    • 34
    • 38

    Chance Snow

    • 44
    • 61

    Chance Rain Showers

    • 41
    • 65

    Rain Showers Likely

    • 33
    • 52

    Snow Likely

Today 23 Apr Central Black Hills

Partly cloudy this Morning, then mostly cloudy with a chance of rain Showers with a slight chance of Thunderstorms this afternoon. Highs in the upper 40s. East Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 23 Apr Central Black Hills

Cloudy. A chance of rain Showers and snow Showers in the Evening, then snow Showers with rain Showers likely after midnight. Snow accumulation up to 1 inch. Lows in the lower 30s. East Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of precipitation 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sylvan Lake Temperature Statistics

April Temperature

Custer, Custer County Airport (8.1 miles)

  • Lowest 5 April, 2025

    14.8 °F

  • Average April

    39.7 °F

  • Highest 11 April, 2025

    73.7 °F

Climate (2020–Present)

Custer, Custer County Airport (8.1 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    44.8 °F

  • Average High 2020–2025

    56.2 °F
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