Princeton Junction Weather Forecast

    • 55
    • 93

    Rain Showers Likely

    • 50
    • 67

    Chance Rain Showers

    • 48
    • 65

    Rain Showers

    • 50
    • 60

    Rain Showers

    • 54
    • 67

    Chance Rain Showers

    • 56
    • 75

    Chance Rain Showers

Today 20 May Mercer

Sunny in the Morning, then partly sunny with Showers likely with a chance of Thunderstorms in the afternoon. Hot with Highs in the lower 90s. Temperature falling into the upper 80s in the afternoon. West Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 20 May Mercer

A chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Much cooler with Lows in the mid 50s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Princeton Junction Temperature Statistics

May Temperature

Trenton, Mercer County Airport (10.6 miles)

  • Lowest 12 May, 2026

    40.6 °F

  • Average May

    59.3 °F

  • Highest 17 May, 2026

    87.1 °F

Climate (2021–Present)

Trenton, Mercer County Airport (10.6 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    64.4 °F
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