Loy Lake Weather Forecast

    • 70
    • 93

    Mostly Sunny

    • 69
    • 91

    Chance Thunderstorms

    • 69
    • 87

    Chance Thunderstorms

    • 70
    • 89

    Chance Rain Showers

    • 70
    • 89

    Chance Rain Showers

    • 66
    • 84

    Chance Rain Showers

Today 17 Sep Grayson

Sunny. A 20 percent chance of Showers in the afternoon. Highs in the lower 90s. Southwest Winds around 5 Mph.

Tonight 17 Sep Grayson

Mostly clear. Lows in the lower 70s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Loy Lake Temperature Statistics

September Temperature

Sherman/Denison, Grayson County Airport (4.3 miles)

  • Lowest 9 September, 2025

    57.2 °F

  • Average September

    74.6 °F

  • Highest 4 September, 2025

    93.2 °F

Climate (2020–Present)

Sherman/Denison, Grayson County Airport (4.3 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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