Old Union Weather Forecast

    • 75
    • 99

    Hot

    • 74
    • 97

    Hot

    • 74
    • 97

    Hot

    • 74
    • 98

    Hot

    • 73
    • 97

    Hot

    • 73
    • 96

    Partly Sunny

Today 12 Sep Limestone

Sunny, hot with Highs in the upper 90s. South Winds 5 to 10 Mph. Heat index Values up to 107.

Tonight 12 Sep Limestone

Mostly clear. Humid with Lows in the mid 70s. South Winds around 5 Mph.

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Old Union Temperature Statistics

September Temperature

Mexia Limestone County Airport (16.8 miles)

  • Lowest 2 September, 2026

    71.8 °F

  • Average September

    82.6 °F

  • Highest 1 September, 2026

    97.3 °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

    79.3 °F
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