Markham Weather Forecast

    • 70
    • 82

    Chance Thunderstorms

    • 72
    • 91

    Chance Thunderstorms

    • 69
    • 88

    Chance Thunderstorms

    • 65
    • 79

    Partly Sunny

    • 65
    • 81

    Mostly Sunny

    • 66
    • 86

    Mostly Sunny

Today 17 Aug Southern Cook

Mostly cloudy through mid Afternoon, then becoming partly cloudy. A slight chance of Showers and Thunderstorms in the morning. Highs in the lower 80s. Northeast Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 17 Aug Southern Cook

Partly cloudy. A slight chance of Showers and Thunderstorms after midnight. Lows in the lower 70s. Northeast Winds 5 to 10 Mph, becoming east after midnight. Chance of precipitation 20 percent.

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Markham Temperature Statistics

August Temperature

Lansing Municipal Airport (9.3 miles)

  • Lowest 2 August, 2025

    54.1 °F

  • Average August

    74.5 °F

  • Highest 9 August, 2025

    90.3 °F

Climate (2020–Present)

Lansing Municipal Airport (9.3 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    60.3 °F
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