Indianapolis International Airport Weather Forecast

    • 71
    • 90

    Partly Sunny

    • 69
    • 92

    Rain Showers Likely

    • 59
    • 79

    Slight Chance Thunderstorms

    • 62
    • 81

    Mostly Sunny

    • 66
    • 86

    Slight Chance Thunderstorms

Today 8 Sep Marion

Partly cloudy. Hot with Highs around 90. East Winds around 5 Mph, becoming south.

Tonight 8 Sep Marion

Mostly clear. Lows in the lower 70s. South Winds 5 to 10 Mph. Gusts up to 20 Mph toward daybreak.

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Indianapolis International Airport Temperature Statistics

September Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 5 September, 2026

    73.9 °F

  • Average September

    85.3 °F

  • Highest 4 September, 2026

    97.6 °F

Climate (2021–2026)

Indianapolis International Airport (0.6 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    55.8 °F

  • Average High 2021–2026

    65.3 °F
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