Foster Weather Forecast

    • 51
    • 78

    Sunny

    • 50
    • 77

    Mostly Sunny

    • 42
    • 63

    Chance Rain

    • 37
    • 58

    Partly Sunny

    • 37
    • 61

    Mostly Sunny

    • 41
    • 65

    Mostly Sunny

    • 43
    • 66

    Chance Rain

Today 7 Oct Cascade Foothills of Marion and Linn Counties

Sunny. Highs in the upper 70s. Winds light.

Tonight 7 Oct Cascade Foothills of Marion and Linn Counties

Clear. Lows in the lower 50s. Winds light.

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Foster Temperature Statistics

October Temperature

Corvallis, Corvallis Municipal Airport (31.7 miles)

  • Lowest 5 October, 2026

    45 °F

  • Average October

    63.4 °F

  • Highest 4 October, 2026

    82 °F

Climate (2021–2026)

Corvallis, Corvallis Municipal Airport (31.7 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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