Columbia River - Tomahawk Island Weather Forecast

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    Rain

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    Rain

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    Rain

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    Chance Rain

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    Rain

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    Rain Likely

Today 17 Dec Inner Portland Metro

A slight chance of Thunderstorms. Rain Showers. Highs in the upper 40s. Southwest wind 10 to 15 Mph. Chance of rain 90 percent. Rainfall Amounts around a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 17 Dec Inner Portland Metro

A slight chance of rain in the Evening, then rain after midnight. Lows in the lower 40s. South wind 5 to 10 Mph. Chance of rain near 100 percent. Rainfall Amounts around a quarter of an inch.

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Columbia River - Tomahawk Island Temperature Statistics

December Temperature

Pearson Airfield (0.6 miles)

  • Lowest 1 December, 2025

    30.9 °F

  • Average December

    50 °F

  • Highest 10 December, 2025

    62.1 °F

Climate (2020–Present)

Pearson Airfield (0.6 miles)

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  • Average Low 2020–2025

    46.5 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    64.6 °F
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