Grass Valley Weather Forecast

    • 54
    • 77

    Becoming Sunny

    • 55
    • 81

    Mostly Sunny

    • 54
    • 81

    Sunny

    • 58
    • 85

    Sunny

    • 62
    • 90

    Sunny

    • 62
    • 93

    Sunny

Today 18 Aug North Central Oregon

Partly cloudy in the morning then clearing. Highs in the upper 70s to lower 80s. Northwest wind 5 to 10 Mph. Gusts up to 25 Mph in the afternoon.

Tonight 18 Aug North Central Oregon

Mostly clear. Lows in the lower to mid 50s. Northwest wind 5 to 15 Mph with Gusts to around 25 Mph.

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Grass Valley Temperature Statistics

August Temperature

The Dalles Municipal Airport (25.5 miles)

  • Lowest 8 August, 2025

    53.7 °F

  • Average August

    75.9 °F

  • Highest 11 August, 2025

    105.7 °F

Climate (2020–Present)

The Dalles Municipal Airport (25.5 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    56.2 °F

  • Average High 2020–2025

    66.8 °F
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