Portage Weather Forecast

    • 67
    • 77

    Chance Thunderstorms

    • 63
    • 76

    Partly Sunny

    • 64
    • 77

    Mostly Sunny

    • 67
    • 84

    Mostly Sunny

    • 61
    • 80

    Mostly Sunny

    • 58
    • 75

    Mostly Sunny

Today 19 Aug Porter

Mostly cloudy through mid Afternoon, then becoming partly cloudy. A chance of Showers and Thunderstorms. Highs in the mid 80s Inland, but only in the lower 80s near the lake. Southwest Winds 5 to 10 Mph, becoming northwest in the afternoon. Chance of precipitation 50 percent.

Tonight 19 Aug Porter

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the upper 60s. North Winds around 5 Mph.

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Portage Temperature Statistics

August Temperature

Gary Regional Airport (11.8 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 (11.8 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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