Harry D Fenton Airport Weather Forecast

    • 48
    • 74

    Slight Chance Thunderstorms

    • 55
    • 74

    Mostly Sunny

    • 59
    • 78

    Mostly Cloudy

    • 44
    • 70

    Chance Thunderstorms

    • 44
    • 64

    Mostly Cloudy

    • 44
    • 62

    Mostly Cloudy

Today 21 Apr Winnebago

Partly cloudy. Highs in the mid 70s. Southwest Winds 10 to 15 Mph. Gusts up to 25 Mph in the morning.

Tonight 21 Apr Winnebago

Mostly clear. Lows in the upper 40s. Northwest Winds around 5 Mph, becoming northeast after midnight.

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Harry D Fenton Airport Temperature Statistics

April Temperature

Janesville-Rock County (9.9 miles)

  • Lowest 7 April, 2026

    23 °F

  • Average April

    48.4 °F

  • Highest 17 April, 2026

    78.8 °F

Climate (2021–Present)

Janesville-Rock County (9.9 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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