Tatum Lake Weather Forecast

    • 44
    • 62

    Sunny

    • 39
    • 65

    Sunny

    • 31
    • 61

    Partly Sunny

    • 27
    • 43

    Mostly Sunny

    • 40
    • 47

    Mostly Cloudy

    • 51
    • 58

    Mostly Cloudy

Today 11 Dec Collin

Sunny. Highs in the lower 60s. South Winds 5 to 10 Mph, becoming southwest 10 to 15 Mph this afternoon.

Tonight 11 Dec Collin

Mostly clear. Lows in the mid 40s. South Winds 5 to 10 Mph.

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Tatum Lake Temperature Statistics

December Temperature

McKinney - McKinney National Airport (13.7 miles)

  • Lowest 2 December, 2025

    28.9 °F

  • Average December

    42.3 °F

  • Highest 9 December, 2025

    64 °F

Climate (2020–Present)

McKinney - McKinney National Airport (13.7 miles)

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  • Average Low 2020–2025

    55.9 °F

  • Average 2020–2025

    66.6 °F

  • Average High 2020–2025

    77.5 °F
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