Day Lake Weather Forecast

    • 50
    • 67

    Chance Rain

    • 50
    • 55

    Chance Rain

    • 47
    • 58

    Mostly Cloudy

    • 48
    • 63

    Partly Sunny

    • 52
    • 70

    Mostly Sunny

    • 54
    • 74

    Mostly Sunny

    • 55
    • 75

    Mostly Sunny

Today 12 Sep Foothills and Valleys of the North Cascades

Cloudy in the morning then becoming partly sunny. Highs in the 70s. Light wind.

Tonight 12 Sep Foothills and Valleys of the North Cascades

Cloudy in the Evening, then a chance of rain after midnight. Lows in the lower to mid 50s. West wind to 10 Mph becoming southeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Day Lake Temperature Statistics

September Temperature

Arlington Municipal Airport (18.6 miles)

  • Lowest 8 September, 2026

    46 °F

  • Average September

    60.7 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (18.6 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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