Southmayd Weather Forecast

    • 76
    • 99

    Sunny

    • 77
    • 99

    Hot

    • 77
    • 99

    Hot

    • 77
    • 99

    Hot

    • 77
    • 99

    Hot

    • 77
    • 98

    Hot

    • 76
    • 97

    Slight Chance Thunderstorms

Today 11 Sep Grayson

Sunny. Highs in the mid 90s. Southwest Winds around 5 Mph.

Tonight 11 Sep Grayson

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Southmayd Temperature Statistics

September Temperature

Sherman/Denison, Grayson County Airport (8.1 miles)

  • Lowest 2 September, 2026

    74.7 °F

  • Average September

    86.4 °F

  • Highest 6 September, 2026

    100.4 °F

Climate (2021–2026)

Sherman/Denison, Grayson County Airport (8.1 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    64.8 °F

  • Average High 2021–2026

    77.2 °F
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