Blackburn Airport Weather Forecast

    • 48
    • 68

    Decreasing Clouds

    • 49
    • 68

    Mostly Cloudy

    • 51
    • 68

    Partly Sunny

    • 54
    • 70

    Partly Sunny

    • 60
    • 69

    Rain Showers Likely

    • 57
    • 67

    Chance Rain Showers

Today 25 Sep Dane

Mostly cloudy. Highs in the upper 60s. East Winds up to 5 Mph.

Tonight 25 Sep Dane

Partly cloudy. Lows in the upper 40s. East Winds up to 5 Mph.

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Blackburn Airport Temperature Statistics

September Temperature

Janesville-Rock County (18 miles)

  • Lowest 14 September, 2026

    42.8 °F

  • Average September

    65.8 °F

  • Highest 1 September, 2026

    91.4 °F

Climate (2021–2026)

Janesville-Rock County (18 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.2 °F
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