Mckinneys Weather Forecast

    • 46
    • 50

    Chance Rain Showers

    • 52
    • 65

    Mostly Cloudy

    • 41
    • 71

    Mostly Sunny

    • 38
    • 58

    Mostly Sunny

    • 46
    • 62

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

Today 5 Dec Coastal Harris

Cloudy with a 40 percent chance of Showers. Highs in the lower 50s. North Winds 5 to 10 Mph.

Tonight 5 Dec Coastal Harris

Mostly cloudy. Near steady temperature in the upper 40s. East Winds around 5 Mph, becoming north after midnight.

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Mckinneys Temperature Statistics

December Temperature

Houston Intercontinental Airport (18 miles)

  • Lowest 2 December, 2025

    37 °F

  • Average December

    44.7 °F

  • Highest 2 December, 2025

    55 °F

Climate (2020–Present)

Houston Intercontinental Airport (18 miles)

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  • Average Low 2020–2025

    62.7 °F

  • Average 2020–2025

    71.7 °F

  • Average High 2020–2025

    82 °F
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