Montesano Weather Forecast

    • 57
    • 75

    Chance Rain

    • 56
    • 66

    Slight Chance Rain

    • 54
    • 70

    Mostly Cloudy

    • 55
    • 80

    Partly Sunny

    • 55
    • 74

    Mostly Cloudy

    • 53
    • 69

    Mostly Cloudy

Today 21 Aug Lower Chehalis River Valley

Mostly cloudy. Highs in the 70s. Light wind becoming west 10 to 15 Mph in the afternoon.

Tonight 21 Aug Lower Chehalis River Valley

Cloudy. A chance of Showers in the morning. Lows in the mid to upper 50s. Southwest wind around 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Montesano Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 3 August, 2026

    49.6 °F

  • Average August

    62.1 °F

  • Highest 4 August, 2026

    79.6 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    58.6 °F
Get WillyWeather+ to remove ads