Dorchester Weather Forecast

    • 77
    • 99

    Slight Chance Thunderstorms

    • 78
    • 99

    Hot

    • 77
    • 99

    Hot

    • 77
    • 99

    Hot

    • 77
    • 99

    Hot

    • 76
    • 98

    Hot

Today 6 Sep Grayson

Sunny, hot with Highs around 100. East Winds around 5 Mph.

Tonight 6 Sep Grayson

Clear. Lows in the upper 70s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dorchester Temperature Statistics

September Temperature

Sherman/Denison, Grayson County Airport (12.4 miles)

  • Lowest 2 September, 2026

    74.7 °F

  • Average September

    85.1 °F

  • Highest 1 September, 2026

    98.6 °F

Climate (2021–2026)

Sherman/Denison, Grayson County Airport (12.4 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    64.8 °F

  • Average High 2021–2026

    77.2 °F
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