Montesano Weather Forecast

    • 51
    • 67

    Increasing Clouds

    • 50
    • 76

    Partly Sunny

    • 56
    • 90

    Mostly Sunny

    • 55
    • 90

    Mostly Sunny

    • 52
    • 79

    Partly Sunny

    • 51
    • 71

    Chance Rain

Today 20 Jun Lower Chehalis River Valley

Mostly sunny. Highs in the 60s to lower 70s. Southwest wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 20 Jun Lower Chehalis River Valley

Mostly cloudy. Lows in the lower to mid 50s. West wind around 10 Mph with Gusts to 20 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

    59.3 °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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