Colusa Weather Forecast

    • 56
    • 86

    Mostly Cloudy

    • 55
    • 88

    Mostly Sunny

    • 57
    • 86

    Mostly Sunny

    • 59
    • 90

    Mostly Sunny

    • 58
    • 91

    Mostly Sunny

    • 56
    • 85

    Partly Sunny

    • 54
    • 83

    Partly Sunny

Today 20 Sep Eastern Colusa County

Partly cloudy in the morning then becoming mostly cloudy. Highs around 86. Light Winds.

Tonight 20 Sep Eastern Colusa County

Mostly cloudy. Lows around 56. Light Winds.

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Colusa Temperature Statistics

September Temperature

Marysville, Yuba County Airport (24.9 miles)

  • Lowest 5 September, 2026

    50.6 °F

  • Average September

    72.6 °F

  • Highest 10 September, 2026

    104.6 °F

Climate (2021–2026)

Marysville, Yuba County Airport (24.9 miles)

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  • Average Low 2021–2026

    51 °F

  • Average 2021–2026

    63.9 °F

  • Average High 2021–2026

    77.3 °F
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