Montesano Weather Forecast

    • 40
    • 56

    Rain Showers Likely

    • 44
    • 64

    Mostly Cloudy

    • 45
    • 66

    Partly Sunny

    • 45
    • 64

    Mostly Cloudy

    • 46
    • 66

    Mostly Cloudy

    • 47
    • 66

    Partly Sunny

Today 16 May Lower Chehalis River Valley

A chance of rain in the Morning, then Showers likely and a slight chance of Thunderstorms in the afternoon. Rainfall Amounts less than a tenth of an inch Likely, except higher Amounts possible in Thunderstorms. Highs in the mid 50s to lower 60s. West wind 10 to 20 Mph. Gusts to 20 Mph increasing to 30 Mph in the afternoon.

Tonight 16 May Lower Chehalis River Valley

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 30s to mid 40s. Northwest wind 10 to 15 Mph with Gusts to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Montesano Temperature Statistics

May Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 7 May, 2026

    48.7 °F

  • Average May

    57.8 °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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