Indianapolis International Airport Weather Forecast

    • 66
    • 92

    Chance Thunderstorms

    • 61
    • 82

    Mostly Sunny

    • 63
    • 84

    Mostly Sunny

    • 70
    • 89

    Mostly Sunny

    • 71
    • 94

    Chance Rain Showers

    • 62
    • 86

    Partly Sunny

Today 5 Sep Marion

Partly cloudy toward Daybreak, then clearing. Isolated Showers and Thunderstorms. Hot with Highs in the lower 90s. West Winds around 5 Mph, becoming north late this afternoon. Chance of rain 20 percent.

Tonight 5 Sep Marion

Mostly clear. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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Indianapolis International Airport Temperature Statistics

September Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 1 September, 2026

    74.6 °F

  • Average September

    85.4 °F

  • Highest 1 September, 2026

    96.7 °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

    65.2 °F
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