Barton Reservoir Weather Forecast

    • 35
    • 60

    Mostly Sunny

    • 36
    • 63

    Partly Sunny

    • 38
    • 64

    Partly Sunny

    • 43
    • 67

    Mostly Cloudy

    • 37
    • 60

    Rain Showers

    • 30
    • 52

    Rain Showers Likely

Today 21 Oct Lower Treasure Valley

Areas of fog this morning. Sunny. Highs 57 to 62. Light Winds.

Tonight 21 Oct Lower Treasure Valley

Mostly clear. Lows 32 to 37. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Barton Reservoir Temperature Statistics

October Temperature

Ontario Municipal Airport (21.7 miles)

  • Lowest 7 October, 2025

    36 °F

  • Average October

    55 °F

  • Highest 10 October, 2025

    80.1 °F

Climate (2020–Present)

Ontario Municipal Airport (21.7 miles)

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  • Average Low 2020–2025

    42.6 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    67 °F
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