Montesano Weather Forecast

    • 50
    • 62

    Decreasing Clouds

    • 48
    • 63

    Mostly Cloudy

    • 51
    • 64

    Slight Chance Rain

    • 49
    • 69

    Partly Sunny

    • 49
    • 71

    Partly Sunny

    • 49
    • 73

    Partly Sunny

Today 30 Jun Lower Chehalis River Valley

Cloudy until late afternoon then becoming partly sunny. Highs in the upper 50s to mid 60s. West wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 30 Jun Lower Chehalis River Valley

Mostly cloudy. Lows near 50. West wind 10 to 15 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

    59.5 °F

  • Highest 14 June, 2026

    87.7 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.4 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    58.6 °F
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