Thunder Lake Weather Forecast

    • 36
    • 52

    Decreasing Clouds

    • 36
    • 54

    Mostly Sunny

    • 43
    • 56

    Mostly Cloudy

    • 41
    • 56

    Mostly Cloudy

    • 43
    • 56

    Rain Likely

    • 41
    • 53

    Rain/Snow

    • 40
    • 50

    Rain/Snow Likely

Today 31 Oct Foothills and Valleys of the North Cascades

Mostly cloudy with a chance of rain. Highs in the mid to upper 50s.

Tonight 31 Oct Foothills and Valleys of the North Cascades

Mostly cloudy in the evening then becoming partly cloudy. Areas of frost and patchy dense fog late in the night. Lows in the 30s to lower 40s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Thunder Lake Temperature Statistics

October Temperature

Arlington Municipal Airport (60.3 miles)

  • Lowest 12 October, 2026

    32 °F

  • Average October

    51.1 °F

  • Highest 16 October, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (60.3 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    60 °F
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