Marysville Weather Forecast

    • 19
    • 51

    Rain

    • 20
    • 26

    Chance Snow Showers

    • 24
    • 43

    Mostly Cloudy

    • 17
    • 32

    Partly Sunny

    • 28
    • 35

    Mostly Cloudy

    • 34
    • 45

    Slight Chance Rain

Today 18 Dec Union

Partly cloudy in the Morning, then rain Showers with a slight chance of Thunderstorms in the afternoon. Breezy with Highs in the lower 50s. South Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of rain 100 percent.

Tonight 18 Dec Union

Partly cloudy. Lows in the upper 20s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Real-Time

Marysville Temperature Statistics

December Temperature

Marysville Union County Airport (0.6 miles)

  • Lowest 14 December, 2025

    2.3 °F

  • Average December

    25.3 °F

  • Highest 10 December, 2025

    39.4 °F

Climate (2020–Present)

Marysville Union County Airport (0.6 miles)

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  • Average Low 2020–2025

    42.7 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    62 °F
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