Preston Weather Forecast

    • 79
    • 99

    Slight Chance Thunderstorms

    • 77
    • 99

    Hot

    • 78
    • 99

    Hot

    • 77
    • 95

    Mostly Cloudy

    • 73
    • 90

    Chance Rain Showers

    • 73
    • 89

    Chance Rain Showers

Today 17 Sep Grayson

Mostly sunny. A less than 20 percent chance of Showers and Thunderstorms this afternoon. Hot with Highs in the upper 90s. South Winds 5 to 10 Mph.

Tonight 17 Sep Grayson

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Preston Temperature Statistics

September Temperature

Sherman/Denison, Grayson County Airport (11.2 miles)

  • Lowest 11 September, 2026

    71.1 °F

  • Average September

    85.7 °F

  • Highest 12 September, 2026

    102.2 °F

Climate (2021–2026)

Sherman/Denison, Grayson County Airport (11.2 miles)

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  • Average Low 2021–2026

    56.1 °F

  • Average 2021–2026

    64.8 °F

  • Average High 2021–2026

    77.3 °F
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