Indianapolis International Airport Weather Forecast

    • 66
    • 82

    Mostly Cloudy

    • 65
    • 85

    Rain Showers

    • 50
    • 70

    Rain Showers

    • 49
    • 67

    Slight Chance Rain Showers

    • 46
    • 70

    Mostly Sunny

    • 42
    • 63

    Mostly Sunny

Today 30 Sep Marion

Partly cloudy. Highs in the lower 80s. South Winds 5 to 10 Mph.

Tonight 30 Sep Marion

Partly cloudy. Warmer with Lows in the mid 60s. South Winds 5 to 10 Mph.

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Indianapolis International Airport Temperature Statistics

September Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 27 September, 2026

    49.6 °F

  • Average September

    74.8 °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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