Dorchester Weather Forecast

    • 57
    • 78

    Mostly Sunny

    • 64
    • 80

    Chance Thunderstorms

    • 61
    • 77

    Rain Showers

    • 57
    • 69

    Rain Showers Likely

    • 59
    • 71

    Partly Sunny

    • 58
    • 77

    Partly Sunny

Today 22 Oct Grayson

Sunny. Highs in the upper 70s. South Winds 5 to 10 Mph.

Tonight 22 Oct Grayson

Mostly clear. Lows in the mid 50s. South Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Dorchester Temperature Statistics

October Temperature

Sherman/Denison, Grayson County Airport (12.4 miles)

  • Lowest 19 October, 2025

    54.3 °F

  • Average October

    73 °F

  • Highest 12 October, 2025

    90 °F

Climate (2020–Present)

Sherman/Denison, Grayson County Airport (12.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    55.3 °F

  • Average 2020–2025

    64 °F

  • Average High 2020–2025

    76.2 °F
Get WillyWeather+ to remove ads