Blackburn Airport Weather Forecast

    • 70
    • 84

    Chance Thunderstorms

    • 68
    • 90

    Chance Thunderstorms

    • 62
    • 84

    Partly Sunny

    • 59
    • 82

    Partly Sunny

    • 62
    • 81

    Mostly Cloudy

    • 70
    • 84

    Chance Rain Showers

    • 65
    • 86

    Chance Rain Showers

Today 3 Sep Dane

Mostly cloudy with a 20 percent chance of light Showers and Thunderstorms. South Winds up to 10 Mph.

Tonight 3 Sep Dane

Partly cloudy through around Midnight, then mostly cloudy with chance of light Showers and Thunderstorms after midnight. Cloudy with light Showers likely and chance of Thunderstorms early in the morning. Patchy fog early in the morning. Lows in the upper 60s. Southeast Winds up to 10 Mph. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Blackburn Airport Temperature Statistics

September Temperature

Janesville-Rock County (18 miles)

  • Lowest 1 September, 2026

    69.8 °F

  • Average September

    77.4 °F

  • Highest 1 September, 2026

    91.4 °F

Climate (2021–2026)

Janesville-Rock County (18 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
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