Chehalis Weather Forecast

    • 44
    • 69

    Increasing Clouds

    • 47
    • 69

    Mostly Cloudy

    • 47
    • 73

    Partly Sunny

    • 49
    • 79

    Partly Sunny

    • 47
    • 74

    Partly Sunny

    • 44
    • 73

    Partly Sunny

Today 18 May Lowlands of Lewis and Southern Thurston Counties

Mostly cloudy in the morning then becoming mostly sunny. Patchy fog in the morning. Highs in the mid 60s to lower 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 18 May Lowlands of Lewis and Southern Thurston Counties

Mostly clear in the evening then becoming mostly cloudy. Patchy fog in the morning. Lows in the lower to mid 40s. West wind to 10 Mph with Gusts to 20 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Chehalis Temperature Statistics

May Temperature

Chehalis-Centralia Airport (1.2 miles)

  • Lowest 15 May, 2026

    42.8 °F

  • Average May

    57.8 °F

  • Highest 3 May, 2026

    84.2 °F

Climate (2021–Present)

Chehalis-Centralia Airport (1.2 miles)

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

  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    61.4 °F
Get WillyWeather+ to remove ads