Grayson County Airport Weather Forecast

    • 72
    • 85

    Chance Thunderstorms

    • 67
    • 88

    Partly Sunny

    • 60
    • 85

    Chance Thunderstorms

    • 58
    • 74

    Mostly Cloudy

    • 54
    • 69

    Rain Showers Likely

    • 50
    • 62

    Chance Thunderstorms

Today 26 Apr Grayson

Mostly cloudy. A 50 percent chance of Showers and Thunderstorms this morning. Highs in the mid 80s. South Winds 10 to 15 Mph.

Tonight 26 Apr Grayson

Partly cloudy with isolated Thunderstorms in the Evening, then mostly cloudy after midnight. Lows in the lower 70s. South Winds 10 to 15 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grayson County Airport Temperature Statistics

April Temperature

Sherman/Denison, Grayson County Airport (0 miles)

  • Lowest 19 April, 2026

    38.1 °F

  • Average April

    66 °F

  • Highest 13 April, 2026

    84.2 °F

Climate (2021–Present)

Sherman/Denison, Grayson County Airport (0 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    64.5 °F

  • Average High 2021–2026

    76.9 °F
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