Dorchester Weather Forecast

    • 73
    • 94

    Rain Showers Likely

    • 72
    • 91

    Chance Thunderstorms

    • 72
    • 91

    Slight Chance Thunderstorms

    • 73
    • 90

    Slight Chance Thunderstorms

    • 76
    • 92

    Mostly Sunny

    • 76
    • 94

    Mostly Sunny

Today 12 Jul Grayson

Mostly sunny with a chance of Thunderstorms. A slight chance of Showers in the Morning, then a chance of Showers in the afternoon. Humid with Highs in the mid 90s. Southwest Winds around 5 Mph, becoming east in the afternoon. Chance of rain 50 percent.

Tonight 12 Jul Grayson

Mostly cloudy with a chance of Showers. A chance of Thunderstorms in the Evening, then a slight chance of Thunderstorms after midnight. Humid with Lows in the mid 70s. East Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dorchester Temperature Statistics

July Temperature

Sherman/Denison, Grayson County Airport (12.4 miles)

  • Lowest 5 July, 2026

    68 °F

  • Average July

    82.5 °F

  • Highest 8 July, 2026

    98.6 °F

Climate (2021–2026)

Sherman/Denison, Grayson County Airport (12.4 miles)

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  • Average Low 2021–2026

    55.9 °F

  • Average 2021–2026

    64.6 °F

  • Average High 2021–2026

    77 °F
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