Sisters Weather Forecast

    • 46
    • 82

    Mostly Sunny

    • 51
    • 88

    Mostly Sunny

    • 48
    • 91

    Mostly Sunny

    • 45
    • 86

    Mostly Sunny

    • 42
    • 81

    Mostly Sunny

    • 40
    • 81

    Mostly Sunny

    • 39
    • 78

    Mostly Sunny

Today 23 Aug East Slopes of the Oregon Cascades

Sunny. Highs in the upper 60s to upper 70s, except in the upper 70s to lower 80s Valleys.

Tonight 23 Aug East Slopes of the Oregon Cascades

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

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Sisters Temperature Statistics

August Temperature

Redmond Roberts Field (19.9 miles)

  • Lowest 2 August, 2026

    38.6 °F

  • Average August

    69.1 °F

  • Highest 6 August, 2026

    99.6 °F

Climate (2021–2026)

Redmond Roberts Field (19.9 miles)

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  • Average Low 2021–2026

    35.6 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    65.6 °F
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