Princeton Weather Forecast

    • 43
    • 71

    Mostly Sunny

    • 50
    • 75

    Mostly Sunny

    • 50
    • 76

    Rain Showers Likely

    • 29
    • 60

    Rain Likely

    • 37
    • 49

    Chance Rain

    • 36
    • 51

    Mostly Cloudy

    • 43
    • 59

    Rain Likely

Today 9 Mar Mercer

Sunny. Highs in the upper 60s. Southwest Winds 5 to 10 Mph.

Tonight 9 Mar Mercer

Clear this Evening, then becoming partly cloudy. Lows in the lower 40s. Southwest Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Princeton Temperature Statistics

March Temperature

Trenton, Mercer County Airport (9.3 miles)

  • Lowest 2 March, 2026

    21 °F

  • Average March

    37.6 °F

  • Highest 7 March, 2026

    51.1 °F

Climate (2021–Present)

Trenton, Mercer County Airport (9.3 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    64.3 °F
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