Princeton Weather Forecast

    • 43
    • 63

    Becoming Sunny

    • 37
    • 60

    Mostly Sunny

    • 36
    • 60

    Mostly Sunny

    • 35
    • 58

    Partly Sunny

    • 36
    • 57

    Partly Sunny

    • 36
    • 55

    Mostly Sunny

    • 38
    • 56

    Partly Sunny

Today 22 Oct Mercer

Mostly sunny. Highs in the lower 60s. West Winds 5 to 10 Mph with Gusts up to 30 Mph.

Tonight 22 Oct Mercer

Partly cloudy this Evening, then becoming mostly clear. Lows in the lower 40s. West Winds 5 to 10 Mph.

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Princeton Temperature Statistics

October Temperature

Trenton, Mercer County Airport (9.3 miles)

  • Lowest 10 October, 2025

    39 °F

  • Average October

    59.1 °F

  • Highest 5 October, 2025

    82.9 °F

Climate (2020–Present)

Trenton, Mercer County Airport (9.3 miles)

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  • Average Low 2020–2025

    46.3 °F

  • Average 2020–2025

    55.4 °F

  • Average High 2020–2025

    64.5 °F
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