Roslyn Weather Forecast

    • 59
    • 84

    Mostly Sunny

    • 57
    • 84

    Mostly Sunny

    • 59
    • 84

    Mostly Sunny

    • 61
    • 86

    Partly Sunny

    • 61
    • 80

    Slight Chance Thunderstorms

    • 60
    • 76

    Chance Rain Showers

Today 15 Sep Lake

Sunny. Highs in the lower 80s Inland, but only in the mid 70s near the lake. East Winds 5 to 10 Mph.

Tonight 15 Sep Lake

Mostly clear. Lows around 60. East Winds around 5 Mph.

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Roslyn Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (11.8 miles)

  • Lowest 7 September, 2025

    46.9 °F

  • Average September

    64.5 °F

  • Highest 12 September, 2025

    84.9 °F

Climate (2020–Present)

Chicago / Wheeling, Pal-Waukee Airport (11.8 miles)

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  • Average Low 2020–2025

    44.1 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    61.5 °F
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