Waterloo Weather Forecast

    • 53
    • 80

    Becoming Sunny

    • 56
    • 89

    Mostly Sunny

    • 52
    • 86

    Partly Sunny

    • 51
    • 81

    Partly Sunny

    • 49
    • 79

    Mostly Sunny

    • 49
    • 79

    Mostly Sunny

Today 23 Aug Linn County Lowlands

Partly sunny this Morning, then clearing. Highs in the lower 80s. Winds Light, becoming north 5 to 10 Mph this afternoon.

Tonight 23 Aug Linn County Lowlands

Mostly clear. Lows in the lower 50s. North wind 5 to 10 Mph.

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Waterloo Temperature Statistics

August Temperature

Corvallis, Corvallis Municipal Airport (22.4 miles)

  • Lowest 4 August, 2026

    48 °F

  • Average August

    68.6 °F

  • Highest 6 August, 2026

    93.9 °F

Climate (2021–2026)

Corvallis, Corvallis Municipal Airport (22.4 miles)

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  • Average Low 2021–2026

    43.4 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    64 °F
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