Three Rivers Weather Forecast

    • 37
    • 72

    Mostly Cloudy

    • 39
    • 78

    Increasing Clouds

    • 27
    • 54

    Chance Rain Showers

    • 30
    • 60

    Partly Sunny

    • 27
    • 60

    Partly Sunny

    • 30
    • 62

    Partly Sunny

    • 33
    • 66

    Partly Sunny

Today 23 Sep East Slopes of the Oregon Cascades

Partly cloudy. Highs in the upper 50s to mid 60s, except in the mid 60s to lower 70s Valleys.

Tonight 23 Sep East Slopes of the Oregon Cascades

Partly cloudy. Lows in the upper 30s to mid 40s.

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Three Rivers Temperature Statistics

September Temperature

Bend Airport AWOS (23 miles)

  • Lowest 5 September, 2026

    39.2 °F

  • Average September

    58.3 °F

  • Highest 9 September, 2026

    89.6 °F

Climate (2021–2026)

Bend Airport AWOS (23 miles)

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  • Average Low 2021–2026

    38.6 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    64.6 °F
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