Indianapolis International Airport Weather Forecast

    • 66
    • 83

    Rain Showers

    • 58
    • 85

    Partly Sunny

    • 60
    • 77

    Mostly Sunny

    • 70
    • 91

    Chance Rain Showers

    • 70
    • 91

    Rain Showers Likely

    • 64
    • 88

    Rain Showers Likely

Today 12 Sep Marion

Cloudy with a chance of Showers and Thunderstorms Early, then partly cloudy with a slight chance of Showers and Thunderstorms late. Highs in the lower 80s. Southwest Winds around 5 Mph. Chance of rain 50 percent.

Tonight 12 Sep Marion

Partly cloudy with a slight chance of Showers and Thunderstorms late this Afternoon, then mostly clear. Patchy fog toward daybreak. Lows in the upper 60s. Southwest Winds around 5 Mph. Chance of rain 20 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

    81.2 °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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