Oshkosh Weather Forecast

    • 47
    • 69

    Becoming Sunny

    • 62
    • 69

    Rain Showers

    • 57
    • 77

    Chance Rain Showers

    • 60
    • 68

    Rain Showers Likely

    • 57
    • 69

    Slight Chance Rain Showers

    • 57
    • 68

    Chance Rain Showers

Today 13 Sep Winnebago

Cooler. Partly sunny. Highs in the upper 60s. Northwest wind 10 to 15 Mph.

Tonight 13 Sep Winnebago

Colder. Clear. Lows in the lower 40s. Northwest wind 5 to 10 Mph in the evening becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Oshkosh Temperature Statistics

September Temperature

Wittman Regional Airport (3.7 miles)

  • Lowest 7 September, 2026

    55.7 °F

  • Average September

    72.1 °F

  • Highest 1 September, 2026

    91.7 °F

Climate (2021–2026)

Wittman Regional Airport (3.7 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    57.3 °F
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