Wallace Weather Forecast

    • 57
    • 75

    Chance Thunderstorms

    • 59
    • 70

    Rain Showers Likely

    • 58
    • 80

    Partly Sunny

    • 55
    • 83

    Mostly Sunny

    • 54
    • 76

    Partly Sunny

    • 55
    • 76

    Mostly Cloudy

Today 16 Sep Western Chester

Mostly cloudy. A slight chance of Showers this afternoon. Highs in the mid 70s. Northeast Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 16 Sep Western Chester

Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms in the Evening, then a chance of Thunderstorms after midnight. Lows in the upper 50s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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Wallace Temperature Statistics

September Temperature

Chester County Airport (9.3 miles)

  • Lowest 9 September, 2025

    48.2 °F

  • Average September

    66.6 °F

  • Highest 6 September, 2025

    84.2 °F

Climate (2020–Present)

Chester County Airport (9.3 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    63.1 °F
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