Sunnyside Weather Forecast

    • 54
    • 68

    Rain Showers Likely

    • 52
    • 69

    Partly Sunny

    • 56
    • 77

    Mostly Sunny

    • 57
    • 85

    Mostly Sunny

    • 57
    • 79

    Mostly Sunny

    • 56
    • 75

    Slight Chance Rain

Today 6 Sep Inner Portland Metro

Cloudy this Morning, then becoming partly sunny. Patchy fog this morning. A 50 percent chance of Showers. Highs around 70. Light and variable Winds, becoming light this afternoon. Rainfall Amounts around a tenth of an inch.

Tonight 6 Sep Inner Portland Metro

Partly cloudy. A slight chance of Showers in the evening. Patchy fog after midnight. Lows in the mid 50s. Winds light. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sunnyside Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (10.6 miles)

  • Lowest 4 September, 2026

    53.1 °F

  • Average September

    61.2 °F

  • Highest 1 September, 2026

    71.7 °F

Climate (2021–2026)

Portland, Portland-Troutdale Airport (10.6 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    56.2 °F

  • Average High 2021–2026

    65.2 °F
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