Dorchester Weather Forecast

    • 66
    • 88

    Partly Sunny

    • 69
    • 86

    Severe Tstms

    • 69
    • 85

    Chance Thunderstorms

    • 67
    • 84

    Chance Thunderstorms

    • 58
    • 79

    Chance Thunderstorms

    • 56
    • 76

    Mostly Sunny

Today 16 May Grayson

Mostly cloudy this Morning, then mostly sunny with a 20 percent chance of Showers and Thunderstorms this afternoon. Some Thunderstorms may be severe. Highs in the upper 80s. Southwest Winds 10 to 15 Mph, becoming west 5 to 10 Mph this afternoon.

Tonight 16 May Grayson

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dorchester Temperature Statistics

May Temperature

Sherman/Denison, Grayson County Airport (12.4 miles)

  • Lowest 4 May, 2025

    49.1 °F

  • Average May

    63.4 °F

  • Highest 13 May, 2025

    91.4 °F

Climate (2020–Present)

Sherman/Denison, Grayson County Airport (12.4 miles)

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  • Average Low 2020–2025

    55.1 °F

  • Average 2020–2025

    63.8 °F

  • Average High 2020–2025

    76.1 °F
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