Chester Weather Forecast

    • 64
    • 70

    Chance Thunderstorms

    • 62
    • 82

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

    • 56
    • 76

    Mostly Sunny

    • 57
    • 76

    Partly Sunny

    • 61
    • 79

    Partly Sunny

Today 17 Sep Delaware

Cloudy with a chance of Thunderstorms. A chance of Showers late this Morning, then Showers likely this afternoon. Near steady temperature in the upper 60s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 17 Sep Delaware

Cloudy. A chance of Showers and Thunderstorms in the Evening, then a slight chance of Showers after midnight. Humid with Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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Chester Temperature Statistics

September Temperature

Philadelphia, Philadelphia International Airport (6.8 miles)

  • Lowest 8 September, 2025

    57 °F

  • Average September

    71.8 °F

  • Highest 6 September, 2025

    90 °F

Climate (2020–Present)

Philadelphia, Philadelphia International Airport (6.8 miles)

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  • Average Low 2020–2025

    50.3 °F

  • Average 2020–2025

    58.4 °F

  • Average High 2020–2025

    67 °F
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