Montesano Weather Forecast

    • 55
    • 90

    Increasing Clouds

    • 51
    • 78

    Mostly Cloudy

    • 52
    • 64

    Rain

    • 48
    • 60

    Rain

    • 52
    • 65

    Chance Rain

    • 50
    • 62

    Mostly Cloudy

    • 50
    • 64

    Mostly Cloudy

Today 23 Jun Lower Chehalis River Valley

Mostly sunny. Highs in the 80s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 23 Jun Lower Chehalis River Valley

Mostly clear until early morning then becoming mostly cloudy. Lows in the mid 50s. West wind around 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

    59.4 °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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