Joanna Weather Forecast

    • 62
    • 79

    Increasing Clouds

    • 63
    • 75

    Rain Showers Likely

    • 59
    • 80

    Chance Thunderstorms

    • 58
    • 78

    Mostly Sunny

    • 61
    • 77

    Mostly Sunny

    • 65
    • 80

    Chance Rain Showers

Today 21 Aug Berks

Sunny. Highs around 80. Northeast Winds 5 to 10 Mph.

Tonight 21 Aug Berks

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 60s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Joanna Temperature Statistics

August Temperature

Chester County Airport (13 miles)

  • Lowest 4 August, 2026

    63.9 °F

  • Average August

    75.2 °F

  • Highest 9 August, 2026

    87.6 °F

Climate (2021–2026)

Chester County Airport (13 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    63 °F
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