Thornton Lake Weather Forecast

    • 44
    • 60

    Increasing Clouds

    • 32
    • 61

    Becoming Sunny

    • 31
    • 58

    Sunny

    • 39
    • 56

    Mostly Sunny

    • 55
    • 69

    Mostly Cloudy

    • 55
    • 79

    Partly Sunny

    • 49
    • 73

    Mostly Sunny

Today 20 Feb Fannin

Mostly sunny. Much cooler with Highs around 60. East Winds 5 to 10 Mph.

Tonight 20 Feb Fannin

Partly cloudy. Lows in the mid 40s. East Winds around 5 Mph.

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  • Temperature Real-Time

Thornton Lake Temperature Statistics

February Temperature

McKinney - McKinney National Airport (21.7 miles)

  • Lowest 1 February, 2026

    20.6 °F

  • Average February

    57 °F

  • Highest 6 February, 2026

    83.6 °F

Climate (2021–Present)

McKinney - McKinney National Airport (21.7 miles)

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  • Average Low 2021–2026

    56.2 °F

  • Average 2021–2026

    66.9 °F

  • Average High 2021–2026

    77.9 °F
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