Indianapolis International Airport Weather Forecast

    • 71
    • 93

    Rain Showers Likely

    • 72
    • 89

    Chance Thunderstorms

    • 70
    • 90

    Chance Rain Showers

    • 66
    • 85

    Slight Chance Thunderstorms

    • 70
    • 90

    Chance Rain Showers

    • 66
    • 86

    Chance Rain Showers

    • 62
    • 81

    Chance Rain Showers

Today 15 Sep Marion

Partly cloudy early this Afternoon, then clearing. A slight chance of Showers and Thunderstorms late. Much warmer with Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph late. Chance of rain 20 percent.

Tonight 15 Sep Marion

Mostly sunny late this Afternoon, then becoming partly cloudy. A slight chance of Showers and Thunderstorms late this Afternoon, then a chance of Showers and Thunderstorms. Warmer with Lows in the lower 70s. South Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming northeast toward daybreak. Chance of rain 50 percent.

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Indianapolis International Airport Temperature Statistics

September Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 7 September, 2026

    62.7 °F

  • Average September

    80.1 °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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