Marysville Weather Forecast

    • 69
    • 85

    Increasing Clouds

    • 68
    • 87

    Rain Showers

    • 57
    • 78

    Rain Showers Likely

    • 59
    • 79

    Partly Sunny

    • 64
    • 83

    Partly Sunny

    • 63
    • 82

    Partly Sunny

Today 8 Sep Union

Mostly sunny in the Morning, then becoming partly cloudy. Highs in the mid 80s. South Winds around 5 Mph.

Tonight 8 Sep Union

Partly cloudy. Muggy and Unseasonably warm. Lows in the upper 60s. South Winds 5 to 10 Mph.

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Marysville Temperature Statistics

September Temperature

Marysville Union County Airport (0.6 miles)

  • Lowest 5 September, 2026

    68 °F

  • Average September

    78.7 °F

  • Highest 1 September, 2026

    93.2 °F

Climate (2021–2026)

Marysville Union County Airport (0.6 miles)

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  • Average Low 2021–2026

    43.1 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    62.6 °F
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