Lake Arrowhead Weather Forecast

    • 46
    • 62

    Mostly Cloudy

    • 45
    • 67

    Increasing Clouds

    • 48
    • 69

    Mostly Cloudy

    • 46
    • 72

    Partly Sunny

    • 48
    • 76

    Partly Sunny

    • 49
    • 78

    Partly Sunny

    • 49
    • 71

    Mostly Cloudy

Today 29 Sep Middle Chehalis River Valley

Mostly cloudy. Highs near 70.

Tonight 29 Sep Middle Chehalis River Valley

Mostly cloudy. Patchy fog late in the night. Lows in the mid to upper 40s. West wind to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Lake Arrowhead Temperature Statistics

September Temperature

Shelton, Shelton Sanderson Field (11.8 miles)

  • Lowest 27 September, 2026

    35.1 °F

  • Average September

    57.8 °F

  • Highest 9 September, 2026

    82.9 °F

Climate (2021–2026)

Shelton, Shelton Sanderson Field (11.8 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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