Sourland Mountain Weather Forecast

    • 56
    • 75

    Increasing Clouds

    • 55
    • 77

    Mostly Sunny

    • 60
    • 80

    Partly Sunny

    • 69
    • 84

    Partly Sunny

    • 60
    • 83

    Partly Sunny

    • 55
    • 75

    Mostly Sunny

Today 6 Sep Hunterdon

Mostly sunny. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 6 Sep Hunterdon

Partly cloudy. Lows in the mid 50s. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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Sourland Mountain Temperature Statistics

September Temperature

Trenton, Mercer County Airport (8.1 miles)

  • Lowest 2 September, 2026

    67.6 °F

  • Average September

    75.7 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Trenton, Mercer County Airport (8.1 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    64.5 °F
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