Indianapolis International Airport Weather Forecast

    • 57
    • 65

    Mostly Cloudy

    • 52
    • 73

    Mostly Cloudy

    • 49
    • 71

    Partly Sunny

    • 50
    • 71

    Partly Sunny

    • 52
    • 73

    Mostly Cloudy

Today 23 Sep Marion

Cloudy. Patchy very light drizzle. Isolated Showers. Highs in the mid 60s. Northeast Winds 5 to 10 Mph. Gusts up to 20 Mph late this afternoon. Chance of rain 20 percent.

Tonight 23 Sep Marion

Mostly cloudy. Isolated Showers through the late overnight. Near steady temperature in the upper 50s. Northeast Winds 5 to 10 Mph. Chance of rain 20 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

    79.4 °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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