Lystair Lake Weather Forecast

    • 45
    • 69

    Becoming Sunny

    • 49
    • 80

    Sunny

    • 50
    • 82

    Mostly Sunny

    • 48
    • 76

    Partly Sunny

    • 49
    • 78

    Partly Sunny

    • 49
    • 78

    Partly Sunny

Today 15 Sep Middle Chehalis River Valley

Mostly cloudy until late afternoon then becoming mostly sunny. Areas of fog in the Morning, then patchy fog late in the morning. Highs in the mid 60s to lower 70s. Light wind.

Tonight 15 Sep Middle Chehalis River Valley

Mostly clear. Patchy fog after midnight. Lows in the 40s. Light wind.

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Lystair Lake Temperature Statistics

September Temperature

Shelton, Shelton Sanderson Field (10.6 miles)

  • Lowest 9 September, 2026

    43 °F

  • Average September

    59.4 °F

  • Highest 9 September, 2026

    82.9 °F

Climate (2021–2026)

Shelton, Shelton Sanderson Field (10.6 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    61.2 °F
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