Johnsburg Weather Forecast

    • 58
    • 76

    Chance Thunderstorms

    • 57
    • 76

    Partly Sunny

    • 61
    • 78

    Chance Thunderstorms

    • 60
    • 80

    Chance Thunderstorms

    • 57
    • 76

    Mostly Sunny

    • 59
    • 75

    Partly Sunny

Today 18 Aug Mower

Mostly cloudy this Morning, then becoming partly sunny. A slight chance of Thunderstorms. A chance of Showers this Morning, then a slight chance of Showers this afternoon. Highs in the mid 70s. West Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 18 Aug Mower

Mostly cloudy in the Evening, then clearing. Lows in the upper 50s. Northwest Winds around 5 Mph.

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Johnsburg Temperature Statistics

August Temperature

Austin Municipal (13.7 miles)

  • Lowest 6 August, 2026

    51.1 °F

  • Average August

    70.1 °F

  • Highest 9 August, 2026

    84.6 °F

Climate (2021–2026)

Austin Municipal (13.7 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    57.4 °F
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