Sylvan Lake Weather Forecast

    • 25
    • 47

    Rain Showers Likely

    • 25
    • 45

    Chance Rain/Snow

    • 25
    • 42

    Rain/Snow Likely

    • 37
    • 53

    Mostly Sunny

    • 44
    • 65

    Chance Rain Showers

    • 34
    • 58

    Rain Showers Likely

Today 1 May Central Black Hills

Mostly cloudy with Showers likely and a slight chance of Thunderstorms. Near steady temperature in the upper 40s. Southwest Winds 10 to 20 Mph with Gusts up to 30 Mph. Chance of rain 60 percent.

Tonight 1 May Central Black Hills

Mostly cloudy with rain Showers likely with a chance of Thunderstorms in the Evening, then partly cloudy with a slight chance of rain Showers and Thunderstorms after midnight. Lows in the upper 20s. North Winds 10 to 15 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

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Sylvan Lake Temperature Statistics

May Temperature

Custer, Custer County Airport (8.1 miles)

  • Lowest

  • Average May

  • Highest

Climate (2019–Present)

Custer, Custer County Airport (8.1 miles)

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  • Average Low 2019–2024

    32.8 °F
  • Average 2019–2024

    44 °F
  • Average High 2019–2024

    54.8 °F
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