Swarthmore Weather Forecast

    • 61
    • 82

    Decreasing Clouds

    • 61
    • 82

    Partly Sunny

    • 63
    • 84

    Partly Sunny

    • 61
    • 83

    Mostly Cloudy

    • 60
    • 82

    Partly Sunny

    • 61
    • 81

    Mostly Cloudy

    • 62
    • 80

    Mostly Cloudy

Today 12 Sep Delaware

Sunny. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 12 Sep Delaware

Partly cloudy this Evening, then clearing. Patchy fog after midnight. Lows in the upper 50s. Southeast Winds around 5 Mph this Evening, becoming light and variable.

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Swarthmore Temperature Statistics

September Temperature

Philadelphia, Philadelphia International Airport (6.2 miles)

  • Lowest 8 September, 2025

    57 °F

  • Average September

    71.2 °F

  • Highest 6 September, 2025

    90 °F

Climate (2020–Present)

Philadelphia, Philadelphia International Airport (6.2 miles)

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  • Average Low 2020–2025

    50.3 °F

  • Average 2020–2025

    58.4 °F

  • Average High 2020–2025

    66.9 °F
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