Copeland Reservoirs Weather Forecast

    • 39
    • 70

    Decreasing Clouds

    • 39
    • 70

    Mostly Sunny

    • 43
    • 76

    Sunny

    • 49
    • 84

    Mostly Sunny

    • 49
    • 83

    Mostly Sunny

    • 40
    • 80

    Breezy

    • 37
    • 61

    Partly Sunny

Today 20 May Malheur County

Mostly sunny. Highs 69 to 75. Northwest Winds 10 to 15 Mph.

Tonight 20 May Malheur County

Partly cloudy. Lows 39 to 49. Breezy. North Winds 10 to 20 Mph with Gusts to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Copeland Reservoirs Temperature Statistics

May Temperature

Ontario Municipal Airport (54.1 miles)

  • Lowest 1 May, 2026

    36.6 °F

  • Average May

    63.4 °F

  • Highest 12 May, 2026

    91.7 °F

Climate (2021–Present)

Ontario Municipal Airport (54.1 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    67.2 °F
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