Jana Airport Weather Forecast

    • 69
    • 83

    Rain Showers Likely

    • 63
    • 82

    Slight Chance Thunderstorms

    • 58
    • 76

    Partly Sunny

    • 58
    • 79

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

    • 53
    • 76

    Mostly Sunny

Today 18 Aug Dane

Mostly cloudy. Patchy fog in the morning. Light Showers likely in the morning. Chance of Thunderstorms through the day. Chance of Showers in the afternoon. Highs in the lower 80s. South Winds 5 to 10 Mph. Chance of precipitation 70 percent.

Tonight 18 Aug Dane

Mostly cloudy. A 50 percent chance of Showers and Thunderstorms until early morning. Patchy fog after midnight. Lows in the upper 60s. Southwest Winds up to 10 Mph.

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Jana Airport Temperature Statistics

August Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 2 August, 2025

    50 °F

  • Average August

    69.8 °F

  • Highest 8 August, 2025

    89.6 °F

Climate (2020–Present)

Janesville-Rock County (17.4 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    60.3 °F
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