William Penn State Forest Weather Forecast

    • 60
    • 84

    Patchy Fog

    • 57
    • 82

    Mostly Cloudy

    • 59
    • 76

    Rain Showers Likely

    • 60
    • 71

    Rain Showers Likely

    • 59
    • 79

    Slight Chance Rain Showers

    • 57
    • 85

    Mostly Sunny

    • 55
    • 78

    Partly Sunny

Today 14 Sep Western Chester

Patchy fog this morning. Sunny. Highs in the lower 80s. North Winds around 5 Mph.

Tonight 14 Sep Western Chester

Partly cloudy. Patchy fog after midnight. Lows in the upper 50s. Northeast Winds around 5 Mph.

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William Penn State Forest Temperature Statistics

September Temperature

Phillips Army Air Field / Aberdeen (18 miles)

  • Lowest 9 September, 2025

    49.3 °F

  • Average September

    70.8 °F

  • Highest 5 September, 2025

    86 °F

Climate (2020–Present)

Phillips Army Air Field / Aberdeen (18 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    57 °F

  • Average High 2020–2025

    65.1 °F
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