Montesano Weather Forecast

    • 31
    • 52

    Sunny

    • 31
    • 52

    Mostly Sunny

    • 32
    • 50

    Partly Sunny

    • 34
    • 49

    Mostly Cloudy

    • 37
    • 47

    Chance Rain

    • 36
    • 47

    Chance Rain/Snow

    • 38
    • 46

    Rain/Snow Likely

Today 18 Jan Lower Chehalis River Valley

Sunny. Highs in the lower to mid 50s. Light wind.

Tonight 18 Jan Lower Chehalis River Valley

Clear. Lows in the 30s. Light wind.

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Montesano Temperature Statistics

January Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 1 January, 2026

    33.1 °F

  • Average January

    46 °F

  • Highest 16 January, 2026

    55.9 °F

Climate (2021–Present)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.2 °F

  • Average High 2021–2026

    58.4 °F
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