Three Rivers Weather Forecast

    • 41
    • 81

    Mostly Sunny

    • 43
    • 83

    Mostly Sunny

    • 46
    • 82

    Partly Sunny

    • 44
    • 80

    Partly Sunny

    • 42
    • 75

    Partly Sunny

    • 41
    • 73

    Partly Sunny

Today 16 Sep East Slopes of the Oregon Cascades

Sunny. Highs in the lower 70s to lower 80s.

Tonight 16 Sep East Slopes of the Oregon Cascades

Mostly clear. Lows in the lower 40s to lower 50s.

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Three Rivers Temperature Statistics

September Temperature

Bend Airport AWOS (23 miles)

  • Lowest 14 September, 2025

    44.6 °F

  • Average September

    68.1 °F

  • Highest 2 September, 2025

    98.6 °F

Climate (2020–Present)

Bend Airport AWOS (23 miles)

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  • Average Low 2020–2025

    38.3 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    64.4 °F
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