Montesano Weather Forecast

    • 38
    • 62

    Decreasing Clouds

    • 40
    • 61

    Increasing Clouds

    • 37
    • 59

    Mostly Cloudy

    • 37
    • 63

    Mostly Sunny

    • 39
    • 65

    Partly Sunny

    • 40
    • 59

    Chance Rain

    • 38
    • 58

    Mostly Cloudy

Today 17 Oct Lower Chehalis River Valley

Mostly cloudy with a chance of rain. Highs in the mid to upper 50s.

Tonight 17 Oct Lower Chehalis River Valley

Mostly clear. Patchy fog late in the night. Lows in the mid 30s to lower 40s. Northwest wind to 10 Mph becoming north after midnight.

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Montesano Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 12 October, 2026

    37.7 °F

  • Average October

    56.4 °F

  • Highest 3 October, 2026

    73.7 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    58.7 °F
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