Sullivan Weather Forecast

    • 20
    • 24

    Snow Showers

    • 16
    • 38

    Chance Rain/Snow

    • 18
    • 23

    Slight Chance Snow Showers

    • 29
    • 35

    Chance Rain/Snow

    • 26
    • 40

    Mostly Cloudy

    • 34
    • 41

    Mostly Cloudy

Today 19 Dec Muskegon

Patchy fog and blowing snow in the morning. Snow Showers. Snow accumulation 1 to 2 Inches. Highs in the mid 20s. Northwest Winds 15 to 25 Mph with Gusts to around 40 Mph. Chance of snow 90 percent.

Tonight 19 Dec Muskegon

Mostly cloudy in the evening then becoming partly cloudy. Lows around 20. Southwest Winds 5 to 10 Mph becoming south 10 to 15 Mph after midnight. Gusts up to 30 Mph.

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Sullivan Temperature Statistics

December Temperature

Muskegon, Muskegon County Airport (9.3 miles)

  • Lowest 8 December, 2025

    1 °F

  • Average December

    24.6 °F

  • Highest 16 December, 2025

    39.9 °F

Climate (2020–Present)

Muskegon, Muskegon County Airport (9.3 miles)

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  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    60 °F
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