Lostine Reservoir Weather Forecast

    • 32
    • 48

    Rain/Snow Likely

    • 35
    • 57

    Chance Rain Showers

    • 39
    • 63

    Partly Sunny

    • 40
    • 66

    Partly Sunny

    • 41
    • 69

    Mostly Sunny

    • 42
    • 71

    Mostly Sunny

    • 42
    • 73

    Partly Sunny

Today 17 May Wallowa County

Mostly cloudy with a chance of rain Showers, high mountain snow Showers and Thunderstorms. Highs in the upper 30s to mid 40s, except in the upper 40s to mid 50s Valleys. North wind 5 to 15 Mph with Gusts to around 35 Mph. Chance of precipitation 50 percent.

Tonight 17 May Wallowa County

Partly cloudy. A chance of rain and high mountain snow Showers. Lows in the mid 20s to mid 30s. North wind 5 to 15 Mph with Gusts to around 40 Mph in the Evening, becoming light. Chance of precipitation 50 percent.

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  • Temperature Real-Time

Lostine Reservoir Temperature Statistics

May Temperature

La Grande/Union County Airport (29.8 miles)

  • Lowest 1 May, 2026

    36 °F

  • Average May

    60.2 °F

  • Highest 12 May, 2026

    91 °F

Climate (2021–Present)

La Grande/Union County Airport (29.8 miles)

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  • Average Low 2021–2026

    38.4 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    62.8 °F
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