Oshkosh Weather Forecast

    • 61
    • 78

    Decreasing Clouds

    • 62
    • 76

    Mostly Sunny

    • 63
    • 79

    Mostly Sunny

    • 64
    • 82

    Mostly Sunny

    • 64
    • 81

    Partly Sunny

    • 60
    • 76

    Chance Rain Showers

    • 56
    • 71

    Chance Rain Showers

Today 13 Sep Winnebago

Partly cloudy. Temperatures near 80. East wind 5 to 10 Mph.

Tonight 13 Sep Winnebago

Mostly clear. Areas of fog after midnight. Lows around 60. East wind 5 to 10 Mph.

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Oshkosh Temperature Statistics

September Temperature

Wittman Regional Airport (3.7 miles)

  • Lowest 4 September, 2025

    42.1 °F

  • Average September

    58.8 °F

  • Highest 1 September, 2025

    75 °F

Climate (2020–Present)

Wittman Regional Airport (3.7 miles)

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  • Average Low 2020–2025

    39.8 °F

  • Average 2020–2025

    48.6 °F

  • Average High 2020–2025

    57.2 °F
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