Mercer Lake Weather Forecast

    • 53
    • 72

    Partly Sunny

    • 50
    • 69

    Mostly Sunny

    • 51
    • 71

    Mostly Sunny

    • 54
    • 68

    Chance Rain

    • 51
    • 69

    Partly Sunny

    • 53
    • 72

    Partly Sunny

    • 55
    • 71

    Chance Rain

Today 17 Sep Central Oregon Coast Range Lowlands

Patchy fog this morning. Mostly sunny. Highs in the upper 70s. Northwest wind 5 to 10 Mph.

Tonight 17 Sep Central Oregon Coast Range Lowlands

Partly cloudy this Evening, then clearing. Lows in the lower 50s. Northwest wind 5 to 10 Mph.

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Mercer Lake Temperature Statistics

September Temperature

Newport, Newport Municipal Airport (36 miles)

  • Lowest 13 September, 2025

    46.4 °F

  • Average September

    57.9 °F

  • Highest 8 September, 2025

    69.8 °F

Climate (2020–Present)

Newport, Newport Municipal Airport (36 miles)

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  • Average Low 2020–2025

    43.9 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    56.4 °F
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