Grass Valley Weather Forecast

    • 50
    • 75

    Gradual Clearing

    • 46
    • 68

    Rain Showers

    • 47
    • 62

    Chance Rain Showers

    • 48
    • 65

    Chance Rain Showers

    • 50
    • 67

    Slight Chance Rain Showers

    • 51
    • 68

    Chance Rain Showers

Today 1 Sep North Central Oregon

Mostly cloudy in the morning then clearing. Patchy smoke. Highs in the upper 70s to lower 80s. West wind 5 to 10 Mph with Gusts to around 30 Mph.

Tonight 1 Sep North Central Oregon

Mostly cloudy. Patchy smoke in the evening. Lows in the upper 40s to lower 50s. Windy. West wind 15 to 25 Mph with Gusts to around 40 Mph.

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  • Temperature Real-Time

Grass Valley Temperature Statistics

September Temperature

The Dalles Municipal Airport (25.5 miles)

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  • Average September

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Climate (2021–2026)

The Dalles Municipal Airport (25.5 miles)

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    56.4 °F

  • Average High 2021–2026

    66.9 °F
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