McKinney Weather Forecast

    • 77
    • 99

    Hot

    • 75
    • 100

    Chance Thunderstorms

    • 71
    • 96

    Chance Thunderstorms

    • 69
    • 92

    Partly Sunny

    • 69
    • 92

    Partly Sunny

    • 70
    • 92

    Partly Sunny

Today 19 Sep Collin

Sunny, hot with Highs in the upper 90s. South Winds 5 to 10 Mph.

Tonight 19 Sep Collin

Mostly clear. Lows in the mid 70s. South Winds 5 to 10 Mph.

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McKinney Temperature Statistics

September Temperature

McKinney - McKinney National Airport (3.1 miles)

  • Lowest 11 September, 2026

    74.6 °F

  • Average September

    88 °F

  • Highest 12 September, 2026

    101.6 °F

Climate (2021–2026)

McKinney - McKinney National Airport (3.1 miles)

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  • Average Low 2021–2026

    56.6 °F

  • Average 2021–2026

    67.6 °F

  • Average High 2021–2026

    78.6 °F
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