Dorchester Weather Forecast

    • 61
    • 81

    Chance Rain Showers

    • 56
    • 82

    Sunny

    • 57
    • 82

    Sunny

    • 59
    • 84

    Mostly Sunny

    • 62
    • 83

    Partly Sunny

    • 63
    • 84

    Partly Sunny

Today 4 Oct Grayson

Partly sunny. A 40 percent chance of Showers this morning. Highs in the lower 80s. North Winds 5 to 10 Mph.

Tonight 4 Oct Grayson

Mostly clear. Lows in the lower 60s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dorchester Temperature Statistics

October Temperature

Sherman/Denison, Grayson County Airport (12.4 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 (12.4 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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