Portland Weather Forecast

    • 25
    • 39

    Mostly Sunny

    • 43
    • 49

    Rain Likely

    • 38
    • 56

    Chance Rain

    • 51
    • 57

    Chance Rain

    • 55
    • 63

    Chance Rain

    • 40
    • 61

    Slight Chance Rain

Today 21 Dec Pendleton

Mostly sunny. Cooler with Highs in the upper 30s. Northwest Winds around 5 Mph.

Tonight 21 Dec Pendleton

Clear in the Evening, then becoming partly cloudy. Lows in the lower 20s. Light and variable Winds, becoming east around 5 Mph after midnight.

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Portland Temperature Statistics

December Temperature

Cincinnati/Northern Kentucky International Airport (23.6 miles)

  • Lowest 15 December, 2025

    -0.9 °F

  • Average December

    29.4 °F

  • Highest 18 December, 2025

    55 °F

Climate (2020–Present)

Cincinnati/Northern Kentucky International Airport (23.6 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    56.4 °F

  • Average High 2020–2025

    65.7 °F
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