Indianapolis International Airport Weather Forecast

    • 71
    • 90

    Chance Rain Showers

    • 65
    • 82

    Chance Rain Showers

    • 70
    • 87

    Partly Sunny

    • 64
    • 86

    Chance Rain Showers

    • 60
    • 78

    Chance Rain Showers

    • 58
    • 72

    Slight Chance Rain Showers

    • 57
    • 73

    Partly Sunny

Today 17 Sep Marion

Partly cloudy. Hot with Highs in the lower 90s. West Winds 5 to 10 Mph.

Tonight 17 Sep Marion

Showers likely with a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Humid with Lows in the lower 70s. Southwest Winds 5 to 10 Mph, becoming north. Chance of rain 70 percent.

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Indianapolis International Airport Temperature Statistics

September Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 14 September, 2026

    59 °F

  • Average September

    79.1 °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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