Spencer Reservoir Weather Forecast

    • 35
    • 73

    Becoming Sunny

    • 37
    • 72

    Partly Sunny

    • 37
    • 68

    Mostly Cloudy

    • 38
    • 65

    Chance Rain Showers

    • 35
    • 62

    Rain Showers Likely

    • 28
    • 52

    Slight Chance Rain/Snow

Today 18 Oct Owyhee Mountains

Sunny. Highs 64 to 74.

Tonight 18 Oct Owyhee Mountains

Mostly clear. Lows 39 to 49.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Spencer Reservoir Temperature Statistics

October Temperature

Mountain Home Air Force Base (42.3 miles)

  • Lowest 14 October, 2026

    33.6 °F

  • Average October

    59.8 °F

  • Highest 4 October, 2026

    89.8 °F

Climate (2021–2026)

Mountain Home Air Force Base (42.3 miles)

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  • Average Low 2021–2026

    40.1 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    65.7 °F
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