Green Bay Weather Forecast

    • 56
    • 66

    Rain Showers

    • 54
    • 64

    Rain Showers

    • 51
    • 66

    Mostly Cloudy

    • 48
    • 62

    Mostly Cloudy

    • 49
    • 62

    Partly Sunny

    • 50
    • 64

    Mostly Cloudy

    • 51
    • 69

    Partly Sunny

Today 18 Sep Brown

Mostly clear. Lows in the upper 40s. Highs in the lower 70s.

Tonight 18 Sep Brown

Showers in the Evening, then Showers and a slight chance of Thunderstorms after midnight. Lows in the middle 50s. East wind 5 to 10 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Green Bay Temperature Statistics

September Temperature

Green Bay, Austin Straubel International Airport (6.2 miles)

  • Lowest 14 September, 2026

    40.6 °F

  • Average September

    67.8 °F

  • Highest 1 September, 2026

    90.6 °F

Climate (2021–2026)

Green Bay, Austin Straubel International Airport (6.2 miles)

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  • Average Low 2021–2026

    38.9 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.5 °F
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