Upper Tumalo Reservoir Weather Forecast

    • 41
    • 70

    Mostly Sunny

    • 44
    • 73

    Partly Sunny

    • 44
    • 72

    Mostly Sunny

    • 46
    • 75

    Partly Sunny

    • 43
    • 74

    Partly Sunny

    • 43
    • 71

    Mostly Sunny

Today 28 Sep East Slopes of the Oregon Cascades

Sunny. Widespread frost in the morning. Highs in the upper 50s to upper 60s, except in the upper 60s to lower 70s Valleys.

Tonight 28 Sep East Slopes of the Oregon Cascades

Mostly clear. Lows in the mid 30s to lower 40s. Gusts up to 20 Mph in the evening.

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Upper Tumalo Reservoir Temperature Statistics

September Temperature

Bend Airport AWOS (11.2 miles)

  • Lowest 23 September, 2026

    37.4 °F

  • Average September

    58.2 °F

  • Highest 9 September, 2026

    89.6 °F

Climate (2021–2026)

Bend Airport AWOS (11.2 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    64.6 °F
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