Grayson County Airport Weather Forecast

    • 73
    • 95

    Chance Thunderstorms

    • 74
    • 91

    Slight Chance Thunderstorms

    • 76
    • 95

    Mostly Cloudy

    • 76
    • 94

    Partly Sunny

    • 77
    • 94

    Partly Sunny

    • 77
    • 95

    Partly Sunny

    • 75
    • 97

    Hot

Today 30 Jun Grayson

Sunny with a 20 percent chance of Showers and Thunderstorms. Highs in the mid 90s. South Winds 5 to 10 Mph. Heat index Values up to 105.

Tonight 30 Jun Grayson

Mostly cloudy with a chance of Thunderstorms. A chance of Showers. Lows in the lower 70s. Southeast Winds around 5 Mph, becoming west after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grayson County Airport Temperature Statistics

June Temperature

Sherman/Denison, Grayson County Airport (0 miles)

  • Lowest 1 June, 2025

    64.4 °F

  • Average June

    81 °F

  • Highest 27 June, 2025

    95 °F

Climate (2020–Present)

Sherman/Denison, Grayson County Airport (0 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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