Delaware River - Fort Mifflin Weather Forecast

    • 30
    • 34

    Snow/Sleet

    • 27
    • 36

    Chance Wintry Mix

    • 37
    • 42

    Rain

    • 28
    • 57

    Rain Likely

    • 26
    • 35

    Partly Sunny

    • 24
    • 38

    Mostly Cloudy

Today 26 Dec Philadelphia

Mostly cloudy. A chance of snow this afternoon. Snow accumulation around an inch possible. Much cooler with Highs in the lower 30s. Northeast Winds around 5 Mph, becoming east this afternoon. Chance of snow 50 percent.

Tonight 26 Dec Philadelphia

Snow, sleet with a slight chance of freezing rain in the Evening, then Rain, Snow, sleet likely with a chance of freezing rain after midnight. Precipitation may be heavy at Times in the evening. Total snow accumulation of 1 to 3 Inches. Ice accumulation around a trace. Cold. Near steady temperature around 30. East Winds 5 to 10 Mph. Chance of precipitation near 100 percent.

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Delaware River - Fort Mifflin Temperature Statistics

December Temperature

Philadelphia, Philadelphia International Airport (0.6 miles)

  • Lowest 9 December, 2025

    18 °F

  • Average December

    35.5 °F

  • Highest 19 December, 2025

    61 °F

Climate (2020–Present)

Philadelphia, Philadelphia International Airport (0.6 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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