Old Mill Creek Weather Forecast

    • 71
    • 78

    Rain Showers Likely

    • 64
    • 84

    Chance Thunderstorms

    • 62
    • 79

    Mostly Sunny

    • 65
    • 81

    Mostly Cloudy

    • 60
    • 78

    Slight Chance Thunderstorms

    • 59
    • 73

    Slight Chance Thunderstorms

Today 15 Aug Lake

Mostly cloudy. Showers likely and a chance of Thunderstorms early in the Morning, then a chance of Showers and a slight chance of Thunderstorms in the late morning and early afternoon. A slight chance of Showers late. Humid. Highs in the upper 70s. Southeast Winds 5 to 10 Mph. Chance of precipitation 70 percent.

Tonight 15 Aug Lake

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers and Thunderstorms after midnight. Humid with Lows in the lower 70s. South Winds around 5 Mph, becoming southwest after midnight. Chance of precipitation 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Old Mill Creek Temperature Statistics

August Temperature

Chicago/Waukegan Regional Airport (5.6 miles)

  • Lowest 9 August, 2026

    58.6 °F

  • Average August

    71.9 °F

  • Highest 4 August, 2026

    84.7 °F

Climate (2021–2026)

Chicago/Waukegan Regional Airport (5.6 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    59.8 °F
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