Ontario Weather Forecast

    • 37
    • 64

    Mostly Sunny

    • 47
    • 72

    Partly Sunny

    • 37
    • 64

    Partly Sunny

    • 41
    • 67

    Partly Sunny

    • 47
    • 74

    Partly Sunny

    • 46
    • 75

    Partly Sunny

Today 19 Apr Oregon Lower Treasure Valley

Mostly sunny. Highs 61 to 66. Light Winds this Morning, becoming southeast 10 to 15 Mph this afternoon.

Tonight 19 Apr Oregon Lower Treasure Valley

Mostly clear. Lows 35 to 40. Northeast Winds up to 10 Mph.

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Ontario Temperature Statistics

April Temperature

Ontario Municipal Airport (1.9 miles)

  • Lowest 8 April, 2024

    33.7 °F

  • Average April

    53.7 °F

  • Highest 12 April, 2024

    82.7 °F

Climate (2019–Present)

Ontario Municipal Airport (1.9 miles)

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  • Average Low 2019–2024

    42.4 °F

  • Average 2019–2024

    54.2 °F

  • Average High 2019–2024

    66.6 °F
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