Barton Reservoir Weather Forecast

    • 60
    • 91

    Mostly Sunny

    • 64
    • 96

    Sunny

    • 65
    • 103

    Hot

    • 64
    • 99

    Hot

    • 64
    • 93

    Sunny

    • 65
    • 96

    Sunny

Today 6 Jul Lower Treasure Valley

Sunny. Highs 87 to 92. Northwest Winds up to 10 Mph.

Tonight 6 Jul Lower Treasure Valley

Mostly clear. Lows 58 to 63. North Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Barton Reservoir Temperature Statistics

July Temperature

Ontario Municipal Airport (21.7 miles)

  • Lowest 1 July, 2025

    64.9 °F

  • Average July

    83.5 °F

  • Highest 1 July, 2025

    102.9 °F

Climate (2020–Present)

Ontario Municipal Airport (21.7 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    67.1 °F
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