Indianapolis International Airport Weather Forecast

    • 64
    • 80

    Decreasing Clouds

    • 63
    • 81

    Partly Sunny

    • 60
    • 79

    Isolated Thunderstorms

    • 56
    • 76

    Partly Sunny

    • 57
    • 74

    Partly Sunny

    • 61
    • 78

    Partly Sunny

    • 64
    • 81

    Slight Chance Thunderstorms

Today 20 Aug Marion

Partly cloudy. Highs around 80. North Winds around 5 Mph.

Tonight 20 Aug Marion

Mostly clear through the late Overnight, then becoming partly cloudy. Patchy dense fog. Lows in the mid 60s. Northeast Winds around 5 Mph.

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Indianapolis International Airport Temperature Statistics

August Temperature

Indianapolis International Airport (0.6 miles)

  • Lowest 18 August, 2026

    63 °F

  • Average August

    77.2 °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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