Indianapolis International Airport Weather Forecast

    • 46
    • 74

    Partly Sunny

    • 49
    • 73

    Partly Sunny

    • 52
    • 74

    Mostly Sunny

    • 59
    • 74

    Chance Rain Showers

    • 64
    • 75

    Chance Rain Showers

Today 26 Sep Marion

Partly cloudy early this Morning, then clearing. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 26 Sep Marion

Clear. Lows in the mid 40s. Northeast Winds around 5 Mph.

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Indianapolis International Airport Temperature Statistics

September Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 22 September, 2026

    57.7 °F

  • Average September

    77.1 °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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