Whitesboro Weather Forecast

    • 68
    • 92

    Chance Thunderstorms

    • 68
    • 89

    Chance Thunderstorms

    • 70
    • 90

    Partly Sunny

    • 70
    • 88

    Chance Thunderstorms

    • 66
    • 87

    Chance Thunderstorms

    • 63
    • 83

    Chance Rain Showers

Today 18 Sep Grayson

Sunny. A 20 percent chance of Showers and Thunderstorms in the afternoon. Highs in the lower 90s. Temperatures falling into the upper 80s in the afternoon. Southwest Winds around 5 Mph.

Tonight 18 Sep Grayson

Mostly clear. Lows in the lower 70s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Whitesboro Temperature Statistics

September Temperature

Sherman/Denison, Grayson County Airport (14.3 miles)

  • Lowest 9 September, 2025

    57.2 °F

  • Average September

    75 °F

  • Highest 4 September, 2025

    93.2 °F

Climate (2020–Present)

Sherman/Denison, Grayson County Airport (14.3 miles)

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  • Average Low 2020–2025

    55.2 °F

  • Average 2020–2025

    63.9 °F

  • Average High 2020–2025

    76.1 °F
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