Montesano Weather Forecast

    • 51
    • 75

    Increasing Clouds

    • 44
    • 60

    Partly Sunny

    • 42
    • 62

    Mostly Sunny

    • 42
    • 68

    Mostly Sunny

    • 50
    • 77

    Mostly Sunny

    • 54
    • 83

    Mostly Cloudy

Today 28 May Lower Chehalis River Valley

Mostly sunny. Highs in the upper 60s to mid 70s. Light wind becoming west 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 28 May Lower Chehalis River Valley

Partly cloudy in the evening then becoming cloudy. Lows near 50. West wind 10 to 20 Mph with Gusts to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Montesano Temperature Statistics

May Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 17 May, 2026

    38.6 °F

  • Average May

    55.9 °F

  • Highest 3 May, 2026

    82.7 °F

Climate (2021–Present)

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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