Upper Tumalo Reservoir Weather Forecast

    • 44
    • 66

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 52
    • 83

    Mostly Sunny

    • 50
    • 82

    Mostly Sunny

    • 45
    • 73

    Partly Sunny

    • 45
    • 66

    Partly Sunny

Today 7 Sep East Slopes of the Oregon Cascades

Sunny. Patchy fog in the morning. Highs in the upper 50s to mid 60s, except in the mid to upper 60s Valleys.

Tonight 7 Sep East Slopes of the Oregon Cascades

Mostly clear. Lows in the mid 30s to lower 40s.

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Upper Tumalo Reservoir Temperature Statistics

September Temperature

Bend Airport AWOS (11.2 miles)

  • Lowest 4 September, 2026

    41 °F

  • Average September

    55.1 °F

  • Highest 1 September, 2026

    77 °F

Climate (2021–2026)

Bend Airport AWOS (11.2 miles)

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  • Average Low 2021–2026

    38.6 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    64.6 °F
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