Chester County G O Carlson Airport Weather Forecast

    • 60
    • 82

    Slight Chance Thunderstorms

    • 58
    • 79

    Partly Sunny

    • 59
    • 74

    Mostly Sunny

    • 60
    • 70

    Mostly 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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Chester County G O Carlson Airport Temperature Statistics

September Temperature

Chester County Airport (0 miles)

  • Lowest 9 September, 2025

    48.2 °F

  • Average September

    66.1 °F

  • Highest 6 September, 2025

    84.2 °F

Climate (2020–Present)

Chester County Airport (0 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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