Glendon Weather Forecast

    • 42
    • 56

    Increasing Clouds

    • 45
    • 61

    Chance Rain Showers

    • 46
    • 72

    Partly Sunny

    • 46
    • 70

    Mostly Cloudy

    • 46
    • 60

    Rain Showers Likely

    • 43
    • 62

    Chance Rain Showers

Today 21 Apr Northampton

Sunny. Highs in the mid 50s. Northwest Winds around 5 Mph, becoming southwest this afternoon.

Tonight 21 Apr Northampton

Mostly cloudy. A slight chance of Showers in the Evening, then Showers likely after midnight. Not as cool with Lows around 40. South Winds 5 to 10 Mph. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Glendon Temperature Statistics

April Temperature

Allentown, Lehigh Valley International Airport (11.2 miles)

  • Lowest 8 April, 2026

    24.7 °F

  • Average April

    56.6 °F

  • Highest 16 April, 2026

    89.7 °F

Climate (2021–Present)

Allentown, Lehigh Valley International Airport (11.2 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    63.5 °F
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