Chehalis River - Cosmopolis Weather Forecast

    • 50
    • 73

    Increasing Clouds

    • 51
    • 67

    Mostly Cloudy

    • 48
    • 69

    Partly Sunny

    • 49
    • 72

    Mostly Sunny

    • 52
    • 73

    Partly Sunny

    • 47
    • 63

    Chance Rain

    • 43
    • 62

    Partly Sunny

Today 4 Oct Lower Chehalis River Valley

Mostly sunny. Highs in the lower 60s.

Tonight 4 Oct Lower Chehalis River Valley

Partly cloudy in the evening then becoming mostly cloudy. Lows near 50. West wind to 10 Mph in the evening becoming light.

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Chehalis River - Cosmopolis Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (6.8 miles)

  • Lowest 1 October, 2026

    50 °F

  • Average October

    58.5 °F

  • Highest 1 October, 2026

    66.9 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (6.8 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    58.6 °F
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