Dorchester Weather Forecast

    • 56
    • 61

    Partly Sunny

    • 36
    • 63

    Mostly Sunny

    • 48
    • 59

    Mostly Sunny

    • 46
    • 74

    Mostly Sunny

    • 50
    • 62

    Mostly Sunny

Today 17 Dec Grayson

Cloudy. Highs in the lower 60s. South Winds 5 to 10 Mph.

Tonight 17 Dec Grayson

Cloudy. A 20 percent chance of rain in the evening. Near steady temperature in the upper 50s. South Winds 5 to 15 Mph.

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Dorchester Temperature Statistics

December Temperature

Sherman/Denison, Grayson County Airport (12.4 miles)

  • Lowest 15 December, 2025

    22.5 °F

  • Average December

    40.7 °F

  • Highest 12 December, 2025

    68 °F

Climate (2020–Present)

Sherman/Denison, Grayson County Airport (12.4 miles)

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  • Average Low 2020–2025

    55.4 °F

  • Average 2020–2025

    64 °F

  • Average High 2020–2025

    76.3 °F
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