Wheaton Creek Reservoir Weather Forecast

    • 57
    • 91

    Becoming Sunny

    • 55
    • 86

    Sunny

    • 57
    • 87

    Sunny

    • 62
    • 92

    Mostly Sunny

    • 65
    • 94

    Partly Sunny

    • 64
    • 92

    Slight Chance Thunderstorms

    • 62
    • 90

    Slight Chance Thunderstorms

Today 19 Aug Malheur County

Sunny. Highs 90 to 96. Northwest Winds 10 to 15 Mph.

Tonight 19 Aug Malheur County

Mostly clear. Lows 52 to 62. Northwest Winds 10 to 15 Mph with Gusts to 25 Mph.

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Wheaton Creek Reservoir Temperature Statistics

August Temperature

Ontario Municipal Airport (43.5 miles)

  • Lowest 5 August, 2025

    52.6 °F

  • Average August

    77 °F

  • Highest 12 August, 2025

    101.6 °F

Climate (2020–Present)

Ontario Municipal Airport (43.5 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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