Big Sandy Lake Weather Forecast

    • -2
    • 27

    Snow Likely

    • 5
    • 16

    Mostly Cloudy

    • 5
    • 20

    Mostly Cloudy

    • 6
    • 22

    Mostly Cloudy

    • 18
    • 28

    Mostly Cloudy

    • 18
    • 34

    Mostly Cloudy

Today 31 Dec Monroe

Snow likely. Snow accumulation around an inch. Highs in the mid 20s. Temperature falling to around 16 this afternoon. Northwest Winds 10 to 15 Mph. Chance of snow 70 percent.

Tonight 31 Dec Monroe

Partly cloudy. Much Colder with Lows around 2 below. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Sandy Lake Temperature Statistics

December Temperature

Sparta, Sparta / Fort McCoy Airport (2.5 miles)

  • Lowest 4 December, 2025

    -12.3 °F

  • Average December

    21.3 °F

  • Highest 23 December, 2025

    43.9 °F

Climate (2020–Present)

Sparta, Sparta / Fort McCoy Airport (2.5 miles)

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  • Average Low 2020–2025

    34.7 °F

  • Average 2020–2025

    47.4 °F

  • Average High 2020–2025

    58.1 °F
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