Upper Tumalo Reservoir Weather Forecast

    • 38
    • 60

    Decreasing Clouds

    • 42
    • 70

    Mostly Sunny

    • 42
    • 71

    Mostly Sunny

    • 43
    • 69

    Mostly Sunny

    • 48
    • 78

    Mostly Sunny

    • 49
    • 83

    Mostly Sunny

Today 13 Sep East Slopes of the Oregon Cascades

Mostly cloudy. A chance of rain and high mountain snow Showers in the Morning, then a chance of rain Showers in the afternoon. Highs in the mid 40s to mid 50s, except in the mid to upper 50s Valleys. West wind 5 to 15 Mph with Gusts to around 30 Mph. Chance of precipitation 50 percent.

Tonight 13 Sep East Slopes of the Oregon Cascades

Mostly cloudy with a 20 percent chance of rain Showers in the Evening, then mostly clear overnight. Lows in the lower 30s to lower 40s. West wind 5 to 15 Mph in the Evening, becoming light. Gusts up to 30 Mph.

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Upper Tumalo Reservoir Temperature Statistics

September Temperature

Bend Airport AWOS (11.2 miles)

  • Lowest 5 September, 2026

    39.2 °F

  • Average September

    57.6 °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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