Portneuf River Slough Weather Forecast

    • 44
    • 69

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 48
    • 75

    Mostly Sunny

    • 52
    • 77

    Mostly Cloudy

    • 51
    • 74

    Partly Sunny

    • 49
    • 73

    Mostly Sunny

    • 49
    • 74

    Sunny

Today 16 Sep Marsh and Arbon Highlands

Sunny. Highs 64 to 74.

Tonight 16 Sep Marsh and Arbon Highlands

Mostly clear. Lows 39 to 49.

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Portneuf River Slough Temperature Statistics

September Temperature

Pocatello, Pocatello Regional Airport (16.2 miles)

  • Lowest 12 September, 2025

    41 °F

  • Average September

    66.3 °F

  • Highest 2 September, 2025

    93 °F

Climate (2020–Present)

Pocatello, Pocatello Regional Airport (16.2 miles)

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  • Average Low 2020–2025

    34.8 °F

  • Average 2020–2025

    48.2 °F

  • Average High 2020–2025

    61.2 °F
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