Delevan National Wildlife Refuge Weather Forecast

    • 54
    • 76

    Sunny

    • 58
    • 88

    Sunny

    • 58
    • 92

    Mostly Sunny

    • 57
    • 87

    Partly Sunny

    • 57
    • 89

    Mostly Sunny

    • 58
    • 88

    Mostly Sunny

    • 59
    • 89

    Mostly Sunny

Today 17 Sep Eastern Colusa County

Mostly cloudy in the morning then clearing. Highs around 76. Light Winds.

Tonight 17 Sep Eastern Colusa County

Clear. Lows around 54. Light Winds.

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Delevan National Wildlife Refuge Temperature Statistics

September Temperature

Oroville Municipal Airport (28 miles)

  • Lowest 14 September, 2026

    51.1 °F

  • Average September

    73.5 °F

  • Highest 10 September, 2026

    105.7 °F

Climate (2021–2026)

Oroville Municipal Airport (28 miles)

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  • Average Low 2021–2026

    53.2 °F

  • Average 2021–2026

    64.9 °F

  • Average High 2021–2026

    76.8 °F
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