Middleton Weather Forecast

    • 53
    • 81

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 52
    • 81

    Mostly Sunny

    • 57
    • 79

    Chance Rain

    • 54
    • 76

    Partly Sunny

    • 55
    • 80

    Partly Sunny

Today 17 Sep Tualatin Valley

Sunny. Highs in the lower 80s. Northwest wind 5 to 10 Mph.

Tonight 17 Sep Tualatin Valley

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 50s. Northwest wind 5 to 10 Mph.

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Middleton Temperature Statistics

September Temperature

Aurora State Airport (8.1 miles)

  • Lowest 15 September, 2025

    46.9 °F

  • Average September

    67.3 °F

  • Highest 4 September, 2025

    90 °F

Climate (2020–Present)

Aurora State Airport (8.1 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    64.9 °F
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