Blackburn Airport Weather Forecast

    • 50
    • 64

    Rain Showers Likely

    • 43
    • 62

    Partly Sunny

    • 43
    • 64

    Partly Sunny

    • 43
    • 65

    Mostly Sunny

    • 49
    • 69

    Partly Sunny

    • 53
    • 73

    Partly Sunny

Today 4 Sep Dane

Mostly sunny. Highs in the mid 60s. West Winds up to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 4 Sep Dane

Light rain Showers likely. Lows around 50. South Winds 5 to 10 Mph increasing to southwest 15 to 20 Mph after midnight. Chance of Showers 70 percent.

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Blackburn Airport Temperature Statistics

September Temperature

Janesville-Rock County (18 miles)

  • Lowest 1 September, 2025

    48.2 °F

  • Average September

    59 °F

  • Highest 1 September, 2025

    77 °F

Climate (2020–Present)

Janesville-Rock County (18 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    60.2 °F
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