Old Union Weather Forecast

    • 74
    • 95

    Slight Chance Thunderstorms

    • 74
    • 96

    Slight Chance Thunderstorms

    • 74
    • 98

    Hot

    • 73
    • 97

    Hot

    • 73
    • 96

    Mostly Sunny

    • 73
    • 96

    Mostly Sunny

Today 5 Sep Limestone

Sunny. A 20 percent chance of Showers and Thunderstorms this afternoon. Highs in the mid 90s. South Winds around 5 Mph, becoming southeast this afternoon.

Tonight 5 Sep Limestone

Partly cloudy in the Evening, then clearing. Humid with Lows in the mid 70s. Southeast 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

    80.9 °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

    79.2 °F
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