Monmouth Weather Forecast

    • 50
    • 76

    Sunny

    • 51
    • 79

    Sunny

    • 51
    • 81

    Mostly Sunny

    • 45
    • 70

    Partly Sunny

    • 41
    • 62

    Chance Rain

    • 41
    • 64

    Mostly Sunny

    • 43
    • 66

    Mostly Sunny

Today 6 Oct West Central Willamette Valley

Sunny. Highs in the upper 60s.

Tonight 6 Oct West Central Willamette Valley

Clear. Lows around 50. Winds light.

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Monmouth Temperature Statistics

October Temperature

Salem - McNary Field (11.8 miles)

  • Lowest 1 October, 2026

    49.6 °F

  • Average October

    63.9 °F

  • Highest 4 October, 2026

    81 °F

Climate (2021–2026)

Salem - McNary Field (11.8 miles)

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  • Average Low 2021–2026

    45.7 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    65.7 °F
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