Porthill Weather Forecast

    • 52
    • 81

    Becoming Sunny

    • 53
    • 85

    Mostly Sunny

    • 54
    • 86

    Mostly Sunny

    • 54
    • 85

    Mostly Sunny

    • 51
    • 82

    Partly Sunny

    • 47
    • 73

    Chance Rain Showers

Today 16 Sep Northern Panhandle

Sunny. Highs in the upper 70s to mid 80s.

Tonight 16 Sep Northern Panhandle

Mostly clear. Lows in the mid 40s to mid 50s.

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Porthill Temperature Statistics

September Temperature

Boundary County Airport (20.5 miles)

  • Lowest 9 September, 2025

    50 °F

  • Average September

    69.6 °F

  • Highest 2 September, 2025

    95 °F

Climate (2020–Present)

Boundary County Airport (20.5 miles)

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  • Average Low 2020–2025

    37.5 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    56.5 °F
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