Idyleside Weather Forecast

    • 18
    • 41

    Becoming Sunny

    • 22
    • 30

    Mostly Sunny

    • 37
    • 41

    Mostly Cloudy

    • 32
    • 48

    Mostly Cloudy

    • 45
    • 45

    Chance Rain

    • 41
    • 59

    Partly Sunny

Today 20 Dec Northern Will

Mostly cloudy. Breezy. Highs around 40. Southwest Winds 15 to 20 Mph, becoming west 10 to 15 Mph in the afternoon. Gusts up to 30 Mph.

Tonight 20 Dec Northern Will

Clear. Lows around 18. West Winds 10 to 15 Mph.

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Idyleside Temperature Statistics

December Temperature

Joliet Regional Airport (2.5 miles)

  • Lowest 5 December, 2025

    -1.1 °F

  • Average December

    24.6 °F

  • Highest 18 December, 2025

    51.8 °F

Climate (2020–Present)

Joliet Regional Airport (2.5 miles)

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  • Average Low 2020–2025

    43.5 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    63 °F
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