Big Sandy Lake Weather Forecast

    • 66
    • 83

    Rain Showers Likely

    • 56
    • 82

    Partly Sunny

    • 59
    • 82

    Slight Chance Thunderstorms

    • 60
    • 82

    Rain Showers

    • 54
    • 78

    Partly Sunny

    • 55
    • 76

    Slight Chance Rain Showers

Today 15 Aug Monroe

Mostly cloudy. A slight chance of rain and Thunderstorms in the morning. Humid with Highs in the lower 80s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 15 Aug Monroe

Mostly cloudy. Showers likely with a chance of Thunderstorms in the evening. Humid with Lows in the mid 60s. Light Winds. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Sandy Lake Temperature Statistics

August Temperature

Sparta, Sparta / Fort McCoy Airport (2.5 miles)

  • Lowest 6 August, 2026

    48.6 °F

  • Average August

    70.9 °F

  • Highest 11 August, 2026

    86.5 °F

Climate (2021–2026)

Sparta, Sparta / Fort McCoy Airport (2.5 miles)

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  • Average Low 2021–2026

    35.1 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    58.3 °F
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