Ontario Weather Forecast

    • 67
    • 91

    Chance Rain Showers

    • 67
    • 98

    Hot

    • 68
    • 102

    Hot

    • 68
    • 101

    Hot

    • 70
    • 102

    Hot

    • 70
    • 101

    Hot

Today 14 Jul Oregon Lower Treasure Valley

Showers likely this Morning, then partly sunny this afternoon. Chance of rain 60 percent. Highs 87 to 92. Northwest Winds 10 to 15 Mph.

Tonight 14 Jul Oregon Lower Treasure Valley

Partly cloudy in the Evening, then clearing. Lows 64 to 69. Northwest Winds up to 10 Mph.

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Ontario Temperature Statistics

July Temperature

Ontario Municipal Airport (1.9 miles)

  • Lowest 2 July, 2026

    53.7 °F

  • Average July

    78.2 °F

  • Highest 5 July, 2026

    100.7 °F

Climate (2021–2026)

Ontario Municipal Airport (1.9 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    67.1 °F
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