Dorchester Weather Forecast

    • 74
    • 92

    Slight Chance Thunderstorms

    • 74
    • 91

    Mostly Sunny

    • 73
    • 92

    Mostly Sunny

    • 71
    • 91

    Partly Sunny

    • 68
    • 86

    Partly Sunny

    • 71
    • 86

    Slight Chance Thunderstorms

    • 72
    • 86

    Chance Thunderstorms

Today 30 May Grayson

Mostly sunny. Highs in the lower 90s. South Winds around 10 Mph.

Tonight 30 May Grayson

Partly cloudy with a 20 percent chance of Showers and Thunderstorms this Evening, then mostly clear after midnight. Lows in the mid 70s. South Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Dorchester Temperature Statistics

May Temperature

Sherman/Denison, Grayson County Airport (12.4 miles)

  • Lowest 2 May, 2026

    44.6 °F

  • Average May

    69 °F

  • Highest 14 May, 2026

    87.8 °F

Climate (2021–Present)

Sherman/Denison, Grayson County Airport (12.4 miles)

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

  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    64.6 °F

  • Average High 2021–2026

    77 °F
Get WillyWeather+ to remove ads