Lostine Reservoir Weather Forecast

    • 49
    • 67

    Chance Thunderstorms

    • 53
    • 74

    Slight Chance Thunderstorms

    • 55
    • 80

    Sunny

    • 54
    • 84

    Mostly Sunny

    • 55
    • 83

    Mostly Sunny

    • 55
    • 82

    Partly Sunny

    • 56
    • 82

    Mostly Sunny

Today 21 Jul Wallowa County

Rain Showers in the Morning, then rain Showers likely and a chance of Thunderstorms in the afternoon. Highs in the upper 50s to mid 60s, except in the upper 60s to lower 70s Valleys. Chance of precipitation 90 percent. Rainfall Amounts up to three Quarters of an inch Possible, except higher Amounts possible in Thunderstorms.

Tonight 21 Jul Wallowa County

Partly cloudy. A 50 percent chance of Showers and Thunderstorms in the evening. Lows in the lower 40s to lower 50s. Rainfall Amounts less than a quarter of an Inch, except higher Amounts possible in Thunderstorms.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lostine Reservoir Temperature Statistics

July Temperature

La Grande/Union County Airport (29.8 miles)

  • Lowest 5 July, 2025

    46.4 °F

  • Average July

    71.9 °F

  • Highest 13 July, 2025

    98.7 °F

Climate (2020–Present)

La Grande/Union County Airport (29.8 miles)

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  • Average Low 2020–2025

    37.8 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    62.3 °F
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