Griffith-Merrillville Airport Weather Forecast

    • 39
    • 55

    Rain

    • 27
    • 41

    Rain

    • 34
    • 39

    Mostly Cloudy

    • 34
    • 54

    Mostly Cloudy

    • 23
    • 40

    Mostly Cloudy

    • 26
    • 34

    Chance Snow

Today 30 Jan Lake

Cloudy. A chance of Showers in the afternoon. Record breaking warmth likely. Highs in the mid 50s. Temperatures falling into the mid 40s in the afternoon. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 50 percent.

Tonight 30 Jan Lake

Cloudy. Rain in the Evening, then a chance of rain and patchy drizzle after midnight. Patchy fog in the Evening, then Areas of fog after midnight. Nearly steady Temperatures around 40. South Winds 5 to 10 Mph in the Evening, becoming east after midnight. Chance of precipitation 90 percent.

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Griffith-Merrillville Airport Temperature Statistics

January Temperature

Gary Regional Airport (6.2 miles)

  • Lowest 21 January, 2025

    -7.6 °F

  • Average January

    21.5 °F

  • Highest 17 January, 2025

    50 °F

Climate (2020–Present)

Gary Regional Airport (6.2 miles)

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  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    51.2 °F

  • Average High 2020–2025

    60.4 °F
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