Indianapolis International Airport Weather Forecast

    • 61
    • 77

    Increasing Clouds

    • 70
    • 92

    Chance Thunderstorms

    • 71
    • 90

    Chance Thunderstorms

    • 69
    • 91

    Slight Chance Thunderstorms

    • 67
    • 87

    Partly Sunny

    • 67
    • 88

    Chance Rain Showers

    • 64
    • 85

    Chance Rain Showers

Today 14 Sep Marion

Mostly sunny. Not as warm with Highs in the upper 70s. East Winds 5 to 10 Mph.

Tonight 14 Sep Marion

Mostly clear through the late Overnight, then becoming partly cloudy. Lows in the lower 60s. Southeast Winds 5 to 10 Mph.

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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

    80.4 °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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