Columbia River - Tomahawk Island Weather Forecast

    • 49
    • 65

    Increasing Clouds

    • 47
    • 70

    Mostly Sunny

    • 53
    • 68

    Partly Sunny

    • 53
    • 66

    Chance Rain

    • 51
    • 66

    Partly Sunny

    • 50
    • 66

    Partly Sunny

Today 26 Sep Inner Portland Metro

Mostly sunny. Highs in the mid 60s. North wind 5 to 10 Mph.

Tonight 26 Sep Inner Portland Metro

Mostly cloudy. Lows in the upper 40s. Winds light.

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  • Temperature Real-Time

Columbia River - Tomahawk Island Temperature Statistics

September Temperature

Pearson Airfield (0.6 miles)

  • Lowest 24 September, 2026

    46.9 °F

  • Average September

    63.4 °F

  • Highest 9 September, 2026

    87.7 °F

Climate (2021–2026)

Pearson Airfield (0.6 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    64.6 °F
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