Jefferson Weather Forecast

    • 59
    • 79

    Rain Showers

    • 48
    • 71

    Rain Showers

    • 50
    • 75

    Sunny

    • 52
    • 85

    Sunny

    • 50
    • 77

    Partly Sunny

    • 48
    • 74

    Mostly Sunny

    • 50
    • 77

    Mostly Sunny

Today 13 Sep East Central Willamette Valley

Mostly sunny. Highs in the lower 80s. Winds light.

Tonight 13 Sep East Central Willamette Valley

Mostly cloudy. Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 50s. Southwest wind 5 to 10 Mph. Chance of rain 80 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.

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Jefferson Temperature Statistics

September Temperature

Salem - McNary Field (12.4 miles)

  • Lowest 2 September, 2025

    57.9 °F

  • Average September

    68.3 °F

  • Highest 4 September, 2025

    91 °F

Climate (2020–Present)

Salem - McNary Field (12.4 miles)

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  • Average Low 2020–2025

    45.8 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    65.6 °F
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