South Mountain Park Weather Forecast

    • 53
    • 72

    Mostly Sunny

    • 65
    • 81

    Increasing Clouds

    • 67
    • 83

    Chance Rain Showers

    • 55
    • 78

    Partly Sunny

    • 59
    • 72

    Rain Showers Likely

    • 61
    • 72

    Chance Rain Showers

    • 59
    • 73

    Chance Rain Showers

Today 15 Sep Lehigh

Sunny. Highs in the lower 70s. East Winds around 5 Mph, becoming south around 5 Mph this afternoon.

Tonight 15 Sep Lehigh

Mostly clear. Lows in the lower 50s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Mountain Park Temperature Statistics

September Temperature

Allentown Queen City Municipal Airport (1.2 miles)

  • Lowest 7 September, 2026

    53.6 °F

  • Average September

    71.7 °F

  • Highest 1 September, 2026

    87.8 °F

Climate (2021–2026)

Allentown Queen City Municipal Airport (1.2 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    54.9 °F

  • Average High 2021–2026

    64 °F
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