Green Bay Weather Forecast

    • 47
    • 61

    Mostly Cloudy

    • 47
    • 62

    Decreasing Clouds

    • 49
    • 64

    Mostly Sunny

    • 49
    • 65

    Partly Sunny

    • 48
    • 67

    Partly Sunny

    • 51
    • 68

    Mostly Cloudy

    • 53
    • 69

    Mostly Cloudy

Today 21 Sep Brown

Partly cloudy. Highs around 70.

Tonight 21 Sep Brown

Mostly cloudy. A slight chance of Sprinkles after midnight. Lows in the middle 40s. Northeast wind 10 to 15 Mph.

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Green Bay Temperature Statistics

September Temperature

Green Bay, Austin Straubel International Airport (6.2 miles)

  • Lowest 14 September, 2026

    40.6 °F

  • Average September

    66.6 °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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