Montesano Weather Forecast

    • 50
    • 80

    Increasing Clouds

    • 50
    • 68

    Mostly Cloudy

    • 52
    • 78

    Mostly Sunny

    • 56
    • 92

    Mostly Sunny

    • 55
    • 90

    Partly Sunny

    • 52
    • 78

    Partly Sunny

Today 19 Jun Lower Chehalis River Valley

Sunny. Highs in the mid 70s to lower 80s. Light wind becoming west to 10 Mph with Gusts to 20 Mph in the afternoon.

Tonight 19 Jun Lower Chehalis River Valley

Partly cloudy. Lows near 50. West wind to 10 Mph with Gusts to 20 Mph.

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Montesano Temperature Statistics

June Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 1 June, 2026

    42.7 °F

  • Average June

    59.3 °F

  • Highest 14 June, 2026

    86 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.4 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    58.7 °F
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