Monticello Weather Forecast

    • 39
    • 72

    Sunny

    • 38
    • 69

    Sunny

    • 51
    • 73

    Partly Sunny

    • 46
    • 73

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

Today 8 Oct Piatt

Sunny. Near steady temperature around 70. Northeast Winds around 10 Mph.

Tonight 8 Oct Piatt

Clear. Lows in the upper 30s. Northeast Winds 5 to 10 Mph.

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Monticello Temperature Statistics

October Temperature

University of Illinois - Willard (15.5 miles)

  • Lowest 2 October, 2025

    55.9 °F

  • Average October

    71.6 °F

  • Highest 3 October, 2025

    91 °F

Climate (2020–Present)

University of Illinois - Willard (15.5 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    64.9 °F
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