Grayson County Airport Weather Forecast

    • 59
    • 75

    Severe Tstms

    • 56
    • 75

    Partly Sunny

    • 61
    • 80

    Sunny

    • 65
    • 86

    Mostly Sunny

    • 71
    • 87

    Partly Sunny

    • 72
    • 89

    Partly Sunny

Today 10 May Grayson

Showers. A chance of Thunderstorms this Morning, then Thunderstorms this afternoon. Some Thunderstorms may be severe this afternoon. Cooler with Highs in the mid 70s. Northeast Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 10 May Grayson

Showers with a slight chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the upper 50s. North Winds 5 to 10 Mph. Chance of rain 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grayson County Airport Temperature Statistics

May Temperature

Sherman/Denison, Grayson County Airport (0 miles)

  • Lowest 2 May, 2026

    44.6 °F

  • Average May

    62.5 °F

  • Highest 4 May, 2026

    80.6 °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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