Granite Falls Weather Forecast

    • 56
    • 79

    Chance Rain Showers

    • 57
    • 82

    Mostly Sunny

    • 57
    • 86

    Mostly Sunny

    • 55
    • 83

    Partly Sunny

    • 53
    • 77

    Partly Sunny

    • 53
    • 78

    Partly Sunny

    • 52
    • 79

    Mostly Sunny

Today 21 Jul Foothills and Valleys of the North Cascades

Mostly sunny. A slight chance of Thunderstorms early in the afternoon. A chance of Showers and a slight chance of Thunderstorms late in the afternoon. Highs in the 70s to lower 80s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 21 Jul Foothills and Valleys of the North Cascades

Mostly cloudy in the evening then becoming partly cloudy. A chance of Thunderstorms in the evening. A slight chance of Thunderstorms late in the Evening, then a slight chance of Showers after midnight. Lows in the mid to upper 50s. West wind to 10 Mph in the evening becoming light.

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Granite Falls Temperature Statistics

July Temperature

Arlington Municipal Airport (9.9 miles)

  • Lowest 4 July, 2025

    46 °F

  • Average July

    64.9 °F

  • Highest 16 July, 2025

    91 °F

Climate (2020–Present)

Arlington Municipal Airport (9.9 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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