Olson Lake Weather Forecast

    • 53
    • 79

    Increasing Clouds

    • 52
    • 71

    Mostly Cloudy

    • 51
    • 73

    Mostly Cloudy

    • 50
    • 76

    Mostly Sunny

    • 53
    • 79

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

Today 24 Jul Foothills and Valleys of the North Cascades

Mostly sunny. Highs in the mid 70s to lower 80s. Light wind becoming southwest around 10 Mph in the afternoon.

Tonight 24 Jul Foothills and Valleys of the North Cascades

Mostly clear in the evening then becoming mostly cloudy. Lows in the lower to mid 50s. West wind to 10 Mph becoming south after midnight. Gusts to 20 Mph.

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  • Temperature Real-Time

Olson Lake Temperature Statistics

July Temperature

Arlington Municipal Airport (3.1 miles)

  • Lowest 4 July, 2025

    46 °F

  • Average July

    64.7 °F

  • Highest 16 July, 2025

    91 °F

Climate (2020–Present)

Arlington Municipal Airport (3.1 miles)

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  • Average Low 2020–2025

    42.3 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    59.7 °F
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