Princeton Weather Forecast

    • 67
    • 84

    Increasing Clouds

    • 70
    • 82

    Chance Thunderstorms

    • 64
    • 89

    Chance Thunderstorms

    • 60
    • 81

    Mostly Sunny

    • 62
    • 82

    Slight Chance Rain Showers

    • 67
    • 85

    Chance Rain Showers

Today 18 Jul Mercer

Sunny. Highs in the mid 80s. Northwest Winds around 5 Mph.

Tonight 18 Jul Mercer

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the upper 60s. Northwest Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Princeton Temperature Statistics

July Temperature

Trenton, Mercer County Airport (9.3 miles)

  • Lowest 5 July, 2025

    59.6 °F

  • Average July

    77.8 °F

  • Highest 8 July, 2025

    93.7 °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

    64.4 °F
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