Collin County Regional Airport at McKinney Weather Forecast

    • 64
    • 78

    Decreasing Clouds

    • 60
    • 77

    Mostly Cloudy

    • 62
    • 78

    Mostly Sunny

    • 61
    • 83

    Mostly Sunny

    • 50
    • 82

    Mostly Cloudy

    • 34
    • 60

    Mostly Cloudy

Today 23 Dec Collin

Areas of fog this morning. Mostly cloudy. Highs in the upper 70s. South Winds 10 to 15 Mph.

Tonight 23 Dec Collin

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 60s. South Winds 5 to 10 Mph.

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Collin County Regional Airport at McKinney Temperature Statistics

December Temperature

McKinney - McKinney National Airport (0 miles)

  • Lowest 15 December, 2025

    23 °F

  • Average December

    46.6 °F

  • Highest 20 December, 2025

    78.1 °F

Climate (2020–Present)

McKinney - McKinney National Airport (0 miles)

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  • Average Low 2020–2025

    56 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    77.5 °F
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