Merrimac Weather Forecast

    • 23
    • 37

    Mostly Cloudy

    • 32
    • 37

    Rain Likely

    • 4
    • 41

    Rain Likely

    • 15
    • 22

    Mostly Cloudy

    • 9
    • 35

    Mostly Cloudy

    • 11
    • 24

    Mostly Cloudy

Today 16 Dec Sauk

Not as cold. Partly sunny. Highs in the mid 30s. Southwest Winds 5 to 15 Mph.

Tonight 16 Dec Sauk

Partly cloudy after midnight then becoming mostly cloudy. Patchy fog. Near steady temperature around 11. South Winds up to 5 Mph.

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Merrimac Temperature Statistics

December Temperature

Baraboo Wisconsin Dells Airport (12.4 miles)

  • Lowest 4 December, 2025

    -9.4 °F

  • Average December

    16 °F

  • Highest 9 December, 2025

    29.3 °F

Climate (2020–Present)

Baraboo Wisconsin Dells Airport (12.4 miles)

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  • Average Low 2020–2025

    38 °F

  • Average 2020–2025

    47.9 °F

  • Average High 2020–2025

    57.6 °F
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