Portneuf River Slough Weather Forecast

    • 55
    • 79

    Chance Rain

    • 52
    • 76

    Rain Likely

    • 46
    • 71

    Rain Showers Likely

    • 45
    • 68

    Slight Chance Thunderstorms

    • 45
    • 72

    Mostly Sunny

    • 47
    • 75

    Partly Sunny

Today 16 Sep Marsh and Arbon Highlands

Mostly sunny. Highs 74 to 83.

Tonight 16 Sep Marsh and Arbon Highlands

Mostly clear in the evening. Then mostly cloudy with a slight chance of rain after midnight. Lows 48 to 58.

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Portneuf River Slough Temperature Statistics

September Temperature

Pocatello, Pocatello Regional Airport (16.2 miles)

  • Lowest 8 September, 2026

    36.6 °F

  • Average September

    63.9 °F

  • Highest 6 September, 2026

    88.6 °F

Climate (2021–2026)

Pocatello, Pocatello Regional Airport (16.2 miles)

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  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    61.9 °F
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