Waterloo Weather Forecast

    • 47
    • 71

    Becoming Sunny

    • 53
    • 76

    Mostly Sunny

    • 61
    • 81

    Partly Sunny

    • 65
    • 83

    Chance Rain Showers

    • 59
    • 80

    Chance Rain Showers

    • 60
    • 78

    Chance Rain Showers

Today 14 Sep Juniata

Sunny. Not as warm with Highs in the lower 70s. North Winds 5 to 10 Mph.

Tonight 14 Sep Juniata

Mostly clear. Cooler with Lows in the upper 40s. North Winds around 5 Mph in the Evening, becoming light and variable.

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Waterloo Temperature Statistics

September Temperature

Altoona - Blair County Airport (32.3 miles)

  • Lowest 7 September, 2026

    51.7 °F

  • Average September

    71.5 °F

  • Highest 1 September, 2026

    90.6 °F

Climate (2021–2026)

Altoona - Blair County Airport (32.3 miles)

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  • Average Low 2021–2026

    43 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    62.2 °F
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