Indianapolis International Airport Weather Forecast

    • 69
    • 83

    Thunderstorms Likely

    • 70
    • 83

    Rain Showers

    • 70
    • 85

    Rain Showers

    • 73
    • 88

    Slight Chance Thunderstorms

    • 69
    • 89

    Chance Thunderstorms

    • 63
    • 82

    Partly Sunny

Today 12 Aug Marion

Thunderstorms likely. Showers likely. Some Thunderstorms may produce heavy rainfall. Highs in the lower 80s. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph late this afternoon. Chance of rain 70 percent.

Tonight 12 Aug Marion

Mostly cloudy with a chance of Showers and Thunderstorms through the late Overnight, then partly cloudy with scattered Showers with isolated Thunderstorms toward daybreak. Some Thunderstorms may produce heavy rainfall through the late overnight. Humid with Lows in the upper 60s. West Winds around 5 Mph, becoming southeast toward daybreak. Chance of rain 50 percent.

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Indianapolis International Airport Temperature Statistics

August Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 3 August, 2026

    64.7 °F

  • Average August

    77.6 °F

  • Highest 8 August, 2026

    90.6 °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

    65.2 °F
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