Loy Lake Weather Forecast

    • 74
    • 91

    Increasing Clouds

    • 72
    • 91

    Thunderstorms

    • 69
    • 77

    Thunderstorms

    • 67
    • 79

    Chance Thunderstorms

    • 65
    • 79

    Chance Rain Showers

    • 61
    • 78

    Slight Chance Rain Showers

Today 29 Sep Grayson

Mostly sunny. Highs in the lower 90s. South Winds 5 to 10 Mph, increasing to 10 to 15 Mph this afternoon.

Tonight 29 Sep Grayson

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 70s. South Winds 5 to 10 Mph.

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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 25 September, 2026

    64.4 °F

  • Average September

    83.8 °F

  • Highest 12 September, 2026

    102.2 °F

Climate (2021–2026)

Sherman/Denison, Grayson County Airport (4.3 miles)

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  • Average Low 2021–2026

    56.1 °F

  • Average 2021–2026

    64.9 °F

  • Average High 2021–2026

    77.3 °F
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