Old Princeton Weather Forecast

    • 70
    • 88

    Rain Showers

    • 68
    • 89

    Chance Rain Showers

    • 70
    • 89

    Chance Rain Showers

    • 68
    • 92

    Mostly Cloudy

    • 64
    • 84

    Chance Rain Showers

    • 60
    • 79

    Chance Rain Showers

Today 16 Sep Cass

Mostly cloudy late this Morning, then becoming partly sunny. A slight chance of Thunderstorms late this morning. A chance of Showers. Not as warm with Highs in the upper 80s. East Winds around 5 Mph, becoming northeast this afternoon. Chance of rain 50 percent.

Tonight 16 Sep Cass

Partly cloudy. Humid with Lows around 70. Northeast Winds around 5 Mph, becoming southeast after midnight.

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Old Princeton Temperature Statistics

September Temperature

Jacksonville Municipal Airport (8.1 miles)

  • Lowest 14 September, 2026

    55.9 °F

  • Average September

    77.1 °F

  • Highest 1 September, 2026

    97.3 °F

Climate (2021–2026)

Jacksonville Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    64.2 °F
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