Montesano Weather Forecast

    • 49
    • 64

    Mostly Sunny

    • 48
    • 73

    Mostly Sunny

    • 54
    • 74

    Rain Likely

    • 40
    • 62

    Chance Rain

    • 42
    • 61

    Mostly Cloudy

    • 40
    • 58

    Chance Rain

    • 39
    • 61

    Partly Sunny

Today 14 Oct Lower Chehalis River Valley

Mostly sunny. A slight chance of rain in the morning. Highs in the lower 60s.

Tonight 14 Oct Lower Chehalis River Valley

Mostly clear. Lows near 50. Light wind becoming east around 10 Mph after midnight.

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Montesano Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 12 October, 2026

    37 °F

  • Average October

    56.2 °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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