Waterloo Weather Forecast

    • 56
    • 84

    Mostly Sunny

    • 55
    • 82

    Partly Sunny

    • 55
    • 78

    Partly Sunny

    • 56
    • 74

    Partly Sunny

    • 55
    • 80

    Partly Sunny

    • 56
    • 85

    Partly Sunny

Today 14 Sep Juniata

Sunny. Very warm with Highs in the mid 80s. Northeast Winds around 5 Mph.

Tonight 14 Sep Juniata

Partly cloudy. Lows in the upper 50s. Light and variable Winds.

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Waterloo Temperature Statistics

September Temperature

Altoona - Blair County Airport (32.3 miles)

  • Lowest 8 September, 2025

    36 °F

  • Average September

    60 °F

  • Highest 5 September, 2025

    82.9 °F

Climate (2020–Present)

Altoona - Blair County Airport (32.3 miles)

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  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    62.2 °F
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