Blackburn Airport Weather Forecast

    • 61
    • 86

    Slight Chance Rain Showers

    • 61
    • 81

    Rain Showers Likely

    • 61
    • 78

    Chance Thunderstorms

    • 62
    • 77

    Rain Showers Likely

    • 60
    • 77

    Chance Rain Showers

    • 56
    • 75

    Slight Chance Thunderstorms

Today 18 Sep Dane

Sunny. A 20 percent chance of light rain Showers late in the afternoon. Highs in the mid 80s. Southeast Winds up to 5 Mph.

Tonight 18 Sep Dane

Partly cloudy with slight chance of light Showers and Thunderstorms in the Evening, then mostly cloudy with slight chance of light Showers in the late evening and overnight. Lows in the lower 60s. East Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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Blackburn Airport Temperature Statistics

September Temperature

Janesville-Rock County (18 miles)

  • Lowest 7 September, 2025

    39.2 °F

  • Average September

    59 °F

  • Highest 14 September, 2025

    84.2 °F

Climate (2020–Present)

Janesville-Rock County (18 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    60.2 °F
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