Northampton Weather Forecast

    • 65
    • 81

    Increasing Clouds

    • 66
    • 83

    Chance Rain Showers

    • 53
    • 80

    Partly Sunny

    • 57
    • 74

    Rain Showers Likely

    • 56
    • 72

    Rain Showers Likely

    • 55
    • 71

    Chance Rain Showers

    • 54
    • 69

    Slight Chance Rain Showers

Today 16 Sep Northampton

Partly sunny with a 30 percent chance of Showers. Highs in the upper 60s.

Tonight 16 Sep Northampton

Partly cloudy this Evening, then becoming mostly cloudy. Warmer with Lows in the mid 60s. South Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Northampton Temperature Statistics

September Temperature

Allentown, Lehigh Valley International Airport (3.1 miles)

  • Lowest 12 September, 2026

    52.6 °F

  • Average September

    72 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Allentown, Lehigh Valley International Airport (3.1 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    63.6 °F
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