Green Bay Weather Forecast

    • 66
    • 77

    Rain Showers

    • 65
    • 79

    Chance Thunderstorms

    • 62
    • 79

    Partly Sunny

    • 62
    • 78

    Partly Sunny

    • 64
    • 78

    Chance Rain Showers

    • 67
    • 79

    Chance Rain Showers

Today 3 Sep Brown

Humid. Showers and a chance of Thunderstorms. Highs in the upper 70s. East wind around 5 Mph in the morning becoming light and variable. Chance of rain 90 percent.

Tonight 3 Sep Brown

Muggy. Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then Showers and a chance of Thunderstorms after midnight. Patchy fog after midnight. Locally heavy rainfall possible after midnight. Lows in the middle 60s. Light and variable wind. Chance of rain 90 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Green Bay Temperature Statistics

September Temperature

Green Bay, Austin Straubel International Airport (6.2 miles)

  • Lowest 1 September, 2026

    68 °F

  • Average September

    78.1 °F

  • Highest 1 September, 2026

    90 °F

Climate (2021–2026)

Green Bay, Austin Straubel International Airport (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    38.8 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.5 °F
Get WillyWeather+ to remove ads