Loy Lake Weather Forecast

    • 71
    • 85

    Chance Thunderstorms

    • 71
    • 89

    Chance Thunderstorms

    • 73
    • 87

    Slight Chance Thunderstorms

    • 74
    • 89

    Partly Sunny

    • 76
    • 92

    Mostly Sunny

    • 77
    • 94

    Mostly Sunny

    • 77
    • 96

    Mostly Sunny

Today 13 Jul Grayson

Mostly cloudy with a 50 percent chance of Showers and Thunderstorms. Highs in the mid 80s. East Winds around 5 Mph.

Tonight 13 Jul Grayson

Mostly cloudy with a 20 percent chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Humid with Lows in the lower 70s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Loy Lake Temperature Statistics

July Temperature

Sherman/Denison, Grayson County Airport (4.3 miles)

  • Lowest 5 July, 2026

    68 °F

  • Average July

    83 °F

  • Highest 8 July, 2026

    98.6 °F

Climate (2021–2026)

Sherman/Denison, Grayson County Airport (4.3 miles)

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  • Average Low 2021–2026

    55.9 °F

  • Average 2021–2026

    64.6 °F

  • Average High 2021–2026

    77 °F
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