Dorchester Weather Forecast

    • 71
    • 91

    Slight Chance Thunderstorms

    • 71
    • 91

    Mostly Sunny

    • 68
    • 90

    Chance Thunderstorms

    • 69
    • 84

    Chance Rain Showers

    • 71
    • 87

    Chance Rain Showers

    • 69
    • 89

    Chance Rain Showers

Today 16 Sep Grayson

Sunny with a 20 percent chance of Showers and Thunderstorms. Highs in the lower 90s. South Winds around 5 Mph.

Tonight 16 Sep Grayson

Mostly clear. A slight chance of Showers and Thunderstorms in the evening. Lows around 70. Light and variable Winds. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Dorchester Temperature Statistics

September Temperature

Sherman/Denison, Grayson County Airport (12.4 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 (12.4 miles)

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

  • Average Low 2020–2025

    55.2 °F

  • Average 2020–2025

    63.9 °F

  • Average High 2020–2025

    76.1 °F
Get WillyWeather+ to remove ads