Montesano Weather Forecast

    • 53
    • 81

    Increasing Clouds

    • 50
    • 77

    Partly Sunny

    • 50
    • 68

    Partly Sunny

    • 52
    • 79

    Mostly Sunny

    • 55
    • 89

    Partly Sunny

    • 55
    • 85

    Partly Sunny

Today 18 Jun Lower Chehalis River Valley

Mostly sunny. Highs in the mid 70s to lower 80s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 18 Jun Lower Chehalis River Valley

Partly cloudy. Lows in the lower to mid 50s. Northwest wind to 10 Mph in the evening becoming light.

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Montesano Temperature Statistics

June Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 1 June, 2026

    42.7 °F

  • Average June

    59.1 °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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