State Line Weather Forecast

    • 70
    • 90

    Chance Thunderstorms

    • 62
    • 84

    Partly Sunny

    • 58
    • 81

    Mostly Sunny

    • 61
    • 81

    Partly Sunny

    • 68
    • 84

    Partly Sunny

    • 68
    • 86

    Chance Rain Showers

Today 4 Sep Eastern St. Joseph

Mostly sunny Early, then becoming partly cloudy. A slight chance of Showers and Thunderstorms early this morning. Hot with Highs around 90. South Winds around 5 Mph, becoming southwest around 5 Mph. Chance of rain 20 percent. Heat index Values up to 102 this afternoon.

Tonight 4 Sep Eastern St. Joseph

Mostly clear with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy with a chance of Showers and Thunderstorms after midnight. Humid with Lows around 70. West Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

State Line Temperature Statistics

September Temperature

South Bend International Airport (4.3 miles)

  • Lowest 1 September, 2026

    73.9 °F

  • Average September

    81 °F

  • Highest 1 September, 2026

    91 °F

Climate (2021–2026)

South Bend International Airport (4.3 miles)

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  • Average Low 2021–2026

    43.2 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    61.9 °F
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