Indianapolis International Airport Weather Forecast

    • 58
    • 68

    Mostly Cloudy

    • 58
    • 68

    Mostly Cloudy

    • 53
    • 73

    Mostly Cloudy

    • 48
    • 69

    Partly Sunny

    • 51
    • 70

    Partly Sunny

    • 54
    • 74

    Mostly Cloudy

Today 22 Sep Marion

Mostly cloudy. Highs in the upper 60s. Northeast Winds 10 to 15 Mph.

Tonight 22 Sep Marion

Mostly cloudy. Lows in the upper 50s. Northeast Winds 5 to 10 Mph. Gusts up to 20 Mph through the late overnight.

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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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