Princeton Weather Forecast

    • 68
    • 91

    Slight Chance Thunderstorms

    • 61
    • 83

    Rain Showers Likely

    • 49
    • 72

    Partly Sunny

    • 44
    • 69

    Mostly Sunny

    • 49
    • 71

    Mostly Sunny

    • 49
    • 78

    Partly Sunny

    • 47
    • 74

    Mostly Sunny

Today 19 Sep Bureau

Mostly sunny. South wind 5 to 10 Mph.

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Princeton Temperature Statistics

September Temperature

Illinois Valley Regional Airport (16.2 miles)

  • Lowest 16 September, 2021

    50.5 °F
  • Average September

    71.1 °F
  • Highest 17 September, 2021

    89.6 °F

Climate (2010–Present)

Illinois Valley Regional Airport (16.2 miles)

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  • Average Low 2010–Present

    43.2 °F
  • Average 2010–Present

    52.2 °F
  • Average High 2010–Present

    61.1 °F
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