Old Union Weather Forecast

    • 78
    • 104

    Slight Chance Thunderstorms

    • 78
    • 105

    Hot

    • 77
    • 103

    Hot

    • 77
    • 103

    Hot

    • 76
    • 103

    Hot

    • 75
    • 102

    Hot

Today 22 Aug Limestone

Mostly sunny. A 20 percent chance of Showers and Thunderstorms this afternoon. Hot with Highs around 104. South Winds 5 to 10 Mph. Heat index Values up to 106.

Tonight 22 Aug Limestone

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the upper 70s. South Winds 5 to 10 Mph.

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Old Union Temperature Statistics

August Temperature

Mexia Limestone County Airport (16.8 miles)

  • Lowest 3 August, 2026

    66.2 °F

  • Average August

    85.4 °F

  • Highest 18 August, 2026

    101.1 °F

Climate (2021–2026)

Mexia Limestone County Airport (16.8 miles)

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  • Average Low 2021–2026

    58.3 °F

  • Average 2021–2026

    68.3 °F

  • Average High 2021–2026

    79.2 °F
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