Denison Weather Forecast

    • 65
    • 74

    Rain Showers Likely

    • 62
    • 82

    Mostly Sunny

    • 58
    • 83

    Sunny

    • 59
    • 83

    Sunny

    • 60
    • 83

    Mostly Sunny

    • 63
    • 84

    Sunny

Today 3 Oct Grayson

Cloudy with Showers likely. Highs in the mid 70s. Northeast Winds around 5 Mph. Chance of rain 70 percent.

Tonight 3 Oct Grayson

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows in the mid 60s. North Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Denison Temperature Statistics

October Temperature

Sherman/Denison, Grayson County Airport (7.5 miles)

  • Lowest 1 October, 2026

    68 °F

  • Average October

    72.8 °F

  • Highest 1 October, 2026

    79.3 °F

Climate (2021–2026)

Sherman/Denison, Grayson County Airport (7.5 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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