Corvallis Weather Forecast

    • 45
    • 71

    Mostly Sunny

    • 53
    • 72

    Mostly Cloudy

    • 48
    • 72

    Partly Sunny

    • 52
    • 74

    Partly Sunny

    • 49
    • 73

    Partly Sunny

    • 51
    • 75

    Mostly Sunny

    • 50
    • 77

    Mostly Sunny

Today 28 Sep Benton County Lowlands

Sunny. Highs in the lower 70s. Light and variable Winds, becoming light.

Tonight 28 Sep Benton County Lowlands

Partly cloudy. Lows in the mid 40s. Winds light.

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Corvallis Temperature Statistics

September Temperature

Corvallis, Corvallis Municipal Airport (4.3 miles)

  • Lowest 23 September, 2026

    41 °F

  • Average September

    59.4 °F

  • Highest 9 September, 2026

    88 °F

Climate (2021–2026)

Corvallis, Corvallis Municipal Airport (4.3 miles)

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  • Average Low 2021–2026

    43.4 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    63.9 °F
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