Princeton Weather Forecast

    • 23
    • 46

    Decreasing Clouds

    • 7
    • 35

    Decreasing Clouds

    • 11
    • 19

    Snow

    • 18
    • 23

    Wintry Mix

    • 6
    • 25

    Chance Snow

    • 6
    • 19

    Partly Sunny

    • 7
    • 23

    Mostly Cloudy

Today 22 Jan Mercer

Mostly cloudy. Not as cool with Highs in the upper 40s. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 22 Jan Mercer

Mostly cloudy this Evening, then becoming partly cloudy. Cold with Lows in the lower 20s. West Winds 5 to 10 Mph.

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Princeton Temperature Statistics

January Temperature

Trenton, Mercer County Airport (9.3 miles)

  • Lowest 20 January, 2026

    10 °F

  • Average January

    32.8 °F

  • Highest 9 January, 2026

    53.1 °F

Climate (2021–Present)

Trenton, Mercer County Airport (9.3 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    64.3 °F
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