Allentown Weather Forecast

    • 57
    • 81

    Increasing Clouds

    • 58
    • 82

    Partly Sunny

    • 58
    • 83

    Mostly Sunny

    • 58
    • 82

    Partly Sunny

    • 57
    • 81

    Partly Sunny

    • 57
    • 81

    Partly Sunny

Today 12 Sep Lehigh

Sunny. Highs in the upper 70s. Northeast Winds around 5 Mph.

Tonight 12 Sep Lehigh

Partly cloudy. Lows in the mid 50s. Light and variable Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Allentown Temperature Statistics

September Temperature

Allentown Queen City Municipal Airport (2.5 miles)

  • Lowest 9 September, 2025

    46.4 °F

  • Average September

    66.6 °F

  • Highest 4 September, 2025

    82.4 °F

Climate (2020–Present)

Allentown Queen City Municipal Airport (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    55 °F

  • Average High 2020–2025

    64.1 °F
Get WillyWeather+ to remove ads