Chehalis River - Cosmopolis Weather Forecast

    • 45
    • 65

    Increasing Clouds

    • 45
    • 71

    Mostly Cloudy

    • 40
    • 62

    Partly Sunny

    • 36
    • 54

    Partly Sunny

    • 36
    • 57

    Partly Sunny

    • 37
    • 59

    Mostly Sunny

Today 4 Apr Lower Chehalis River Valley

Partly sunny in the morning then becoming sunny. Areas of fog and patchy frost in the morning. Patchy fog late in the morning. Highs in the 60s. Light wind.

Tonight 4 Apr Lower Chehalis River Valley

Partly cloudy in the evening then becoming mostly cloudy. Lows in the 40s. Light wind.

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Chehalis River - Cosmopolis Temperature Statistics

April Temperature

Hoquiam, Bowerman Airport (6.8 miles)

  • Lowest 1 April, 2026

    44.1 °F

  • Average April

    45.6 °F

  • Highest 1 April, 2026

    48 °F

Climate (2021–Present)

Hoquiam, Bowerman Airport (6.8 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    58.6 °F
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