Lake Owyhee Weather Forecast

    • 59
    • 86

    Mostly Sunny

    • 59
    • 87

    Mostly Cloudy

    • 57
    • 86

    Mostly Sunny

    • 48
    • 81

    Mostly Sunny

    • 51
    • 80

    Mostly Sunny

    • 53
    • 84

    Partly Sunny

Today 18 Sep Malheur County

Sunny. Highs 80 to 86. Light Winds this Morning, becoming east 10 to 15 Mph this afternoon.

Tonight 18 Sep Malheur County

Mostly cloudy. Lows 52 to 60. North Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Owyhee Temperature Statistics

September Temperature

Caldwell - Caldwell Industrial Airport (36.7 miles)

  • Lowest 13 September, 2025

    51.1 °F

  • Average September

    71.6 °F

  • Highest 1 September, 2025

    97 °F

Climate (2020–Present)

Caldwell - Caldwell Industrial Airport (36.7 miles)

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  • Average Low 2020–2025

    41.5 °F

  • Average 2020–2025

    53 °F

  • Average High 2020–2025

    65 °F
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