Merrillville Weather Forecast

    • 60
    • 74

    Chance Rain Showers

    • 59
    • 78

    Increasing Clouds

    • 59
    • 73

    Rain Showers

    • 54
    • 67

    Slight Chance Rain Showers

    • 56
    • 71

    Chance Rain Showers

    • 57
    • 75

    Chance Thunderstorms

    • 57
    • 72

    Slight Chance Thunderstorms

Today 19 Jun Lake

Partly cloudy. Temperatures in the mid 70s. Northwest Winds around 10 Mph.

Tonight 19 Jun Lake

Mostly cloudy early in the Evening, then becoming partly cloudy. A slight chance of Thunderstorms early in the evening. A chance of Showers. Lows around 60. West Winds 5 to 10 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Merrillville Temperature Statistics

June Temperature

Gary Regional Airport (9.3 miles)

  • Lowest 3 June, 2026

    50 °F

  • Average June

    69.8 °F

  • Highest 10 June, 2026

    93.2 °F

Climate (2021–2026)

Gary Regional Airport (9.3 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    61.3 °F
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