Parleys Reservoir Weather Forecast

    • 47
    • 71

    Rain Showers

    • 42
    • 67

    Rain Showers Likely

    • 40
    • 61

    Rain Showers Likely

    • 41
    • 66

    Mostly Sunny

    • 43
    • 71

    Mostly Sunny

    • 43
    • 72

    Mostly Sunny

Today 17 Sep Blackfoot Mountains

Rain Showers likely and a slight chance of Thunderstorms in the morning. Then a chance of Showers and Thunderstorms in the afternoon. Highs 70 to 77.

Tonight 17 Sep Blackfoot Mountains

Partly cloudy with a slight chance of Showers and Thunderstorms in the evening. Then mostly cloudy with a chance of rain Showers and a slight chance of Thunderstorms after midnight. Lows 45 to 55.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Parleys Reservoir Temperature Statistics

September Temperature

Idaho Falls Regional Airport (29.2 miles)

  • Lowest 8 September, 2026

    34.6 °F

  • Average September

    62.4 °F

  • Highest 6 September, 2026

    86.6 °F

Climate (2021–2026)

Idaho Falls Regional Airport (29.2 miles)

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  • Average Low 2021–2026

    33.8 °F

  • Average 2021–2026

    46.9 °F

  • Average High 2021–2026

    60 °F
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