Rosemont Weather Forecast

    • 44
    • 62

    Sunny

    • 46
    • 66

    Mostly Sunny

    • 49
    • 67

    Mostly Sunny

    • 52
    • 70

    Mostly Sunny

    • 53
    • 70

    Mostly Sunny

    • 53
    • 69

    Partly Sunny

Today 18 Oct Central Cook

Sunny. Highs in the lower 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 18 Oct Central Cook

Clear. Lows in the mid 40s. South Winds 5 to 10 Mph.

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Rosemont Temperature Statistics

October Temperature

Chicago, Chicago-O'Hare International Airport (1.2 miles)

  • Lowest 5 October, 2026

    47.6 °F

  • Average October

    65.2 °F

  • Highest 12 October, 2026

    88.6 °F

Climate (2021–2026)

Chicago, Chicago-O'Hare International Airport (1.2 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    61.9 °F
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