Fairmount Park Weather Forecast

    • 31
    • 38

    Mostly Sunny

    • 24
    • 45

    Decreasing Clouds

    • 29
    • 39

    Chance Rain/Snow

    • 35
    • 46

    Chance Rain

    • 31
    • 44

    Chance Rain

    • 39
    • 45

    Chance Rain

    • 36
    • 54

    Slight Chance Rain

Today 20 Dec Philadelphia

Sunny this Morning, then becoming partly sunny. Much cooler with Highs in the upper 30s. West Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming southwest this afternoon.

Tonight 20 Dec Philadelphia

Mostly clear. Cold with Lows in the lower 30s. Temperature rising into the mid 30s after midnight. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairmount Park Temperature Statistics

December Temperature

Philadelphia, Philadelphia International Airport (8.1 miles)

  • Lowest 9 December, 2025

    18 °F

  • Average December

    34.2 °F

  • Highest 18 December, 2025

    55.9 °F

Climate (2020–Present)

Philadelphia, Philadelphia International Airport (8.1 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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