Gary/Chicago International Airport Weather Forecast

    • 72
    • 87

    Thunderstorms

    • 71
    • 83

    Chance Thunderstorms

    • 66
    • 75

    Partly Sunny

    • 66
    • 76

    Mostly Sunny

    • 68
    • 84

    Mostly Sunny

    • 63
    • 81

    Mostly Sunny

Today 18 Aug Lake

Mostly cloudy late in the Morning, then becoming partly cloudy. A chance of Showers and Thunderstorms late in the Morning, then isolated Showers and Thunderstorms early to mid afternoon. Scattered Showers and Thunderstorms late in the afternoon. Highs in the upper 80s. Southeast Winds 5 to 10 Mph. Chance of precipitation 50 percent.

Tonight 18 Aug Lake

Numerous Showers and Thunderstorms early in the Evening, then a chance of Showers and Thunderstorms late in the evening. Showers and Thunderstorms likely after midnight. Lows in the lower 70s. South Winds 5 to 10 Mph. Chance of precipitation 60 percent.

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Gary/Chicago International Airport Temperature Statistics

August Temperature

Gary Regional Airport (0 miles)

  • Lowest 2 August, 2025

    57.2 °F

  • Average August

    76.7 °F

  • Highest 16 August, 2025

    96.8 °F

Climate (2020–Present)

Gary Regional Airport (0 miles)

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  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    51.4 °F

  • Average High 2020–2025

    60.8 °F
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