Indianapolis International Airport Weather Forecast

    • 61
    • 87

    Rain Showers Likely

    • 56
    • 72

    Rain Showers Likely

    • 57
    • 71

    Chance Thunderstorms

    • 56
    • 70

    Slight Chance Thunderstorms

    • 56
    • 71

    Mostly Cloudy

    • 55
    • 74

    Partly Sunny

Today 20 Sep Marion

Partly cloudy. Showers likely with a chance of Thunderstorms late in the afternoon. Humid with Highs in the mid 80s. North Winds 5 to 10 Mph. Gusts up to 20 Mph late in the afternoon. Chance of rain 70 percent.

Tonight 20 Sep Marion

Mostly cloudy with a chance of Showers and Thunderstorms. Lows in the lower 60s. Northeast Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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Indianapolis International Airport Temperature Statistics

September Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 14 September, 2026

    58.6 °F

  • Average September

    79.7 °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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