Radnor Township Weather Forecast

    • 60
    • 82

    Slight Chance Rain Showers

    • 58
    • 85

    Mostly Sunny

    • 56
    • 76

    Partly Sunny

    • 58
    • 75

    Partly Sunny

    • 60
    • 77

    Partly Sunny

    • 61
    • 80

    Partly Sunny

Today 18 Sep Delaware

Mostly sunny. A slight chance of Showers in the morning. Patchy fog in the morning. Warmer with Highs in the lower 80s. North Winds around 5 Mph. Chance of rain 20 percent.

Tonight 18 Sep Delaware

Mostly clear. Lows in the lower 60s. West Winds around 5 Mph.

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Radnor Township Temperature Statistics

September Temperature

Philadelphia - Wings Field Airport (8.7 miles)

  • Lowest 8 September, 2025

    46.4 °F

  • Average September

    68.1 °F

  • Highest 6 September, 2025

    85.3 °F

Climate (2020–Present)

Philadelphia - Wings Field Airport (8.7 miles)

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  • Average Low 2020–2025

    44.7 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    64.6 °F
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