Van Alstyne Weather Forecast

    • 73
    • 91

    Mostly Sunny

    • 71
    • 91

    Mostly Sunny

    • 72
    • 94

    Mostly Sunny

    • 72
    • 94

    Partly Sunny

    • 68
    • 92

    Chance Rain Showers

    • 64
    • 82

    Chance Rain Showers

Today 21 Aug Grayson

Sunny with Highs in the lower 90s. Northeast Winds around 5 Mph.

Tonight 21 Aug Grayson

Mostly clear. Lows in the lower 70s. Light and variable Winds, becoming north around 5 Mph.

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Van Alstyne Temperature Statistics

August Temperature

McKinney - McKinney National Airport (16.8 miles)

  • Lowest 4 August, 2025

    67.6 °F

  • Average August

    85.6 °F

  • Highest 14 August, 2025

    99.6 °F

Climate (2020–Present)

McKinney - McKinney National Airport (16.8 miles)

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  • Average Low 2020–2025

    55.7 °F

  • Average 2020–2025

    66.3 °F

  • Average High 2020–2025

    77.2 °F
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