Altoona Weather Forecast

    • 70
    • 92

    Rain Showers

    • 62
    • 83

    Chance Rain Showers

    • 60
    • 80

    Sunny

    • 67
    • 85

    Rain Showers Likely

    • 60
    • 80

    Chance Rain Showers

    • 61
    • 74

    Rain Showers Likely

    • 58
    • 79

    Rain Showers Likely

Today 8 Sep Polk

Mostly sunny. Highs around 90. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Heat index Values up to 100.

Tonight 8 Sep Polk

Thunderstorms likely. Showers. Lows around 70. Northeast Winds 5 to 10 Mph with Gusts up to 35 Mph, becoming west. Chance of rain 90 percent.

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Altoona Temperature Statistics

September Temperature

Ankeny Regional Airport (5.6 miles)

  • Lowest 6 September, 2026

    68 °F

  • Average September

    82 °F

  • Highest 1 September, 2026

    95 °F

Climate (2021–2026)

Ankeny Regional Airport (5.6 miles)

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  • Average Low 2021–2026

    41.5 °F

  • Average 2021–2026

    52.2 °F

  • Average High 2021–2026

    62.4 °F
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