Old Union Weather Forecast

    • 68
    • 84

    Slight Chance Thunderstorms

    • 64
    • 86

    Rain Showers Likely

    • 57
    • 77

    Partly Sunny

    • 61
    • 80

    Mostly Sunny

    • 65
    • 85

    Mostly Sunny

    • 67
    • 86

    Partly Sunny

Today 9 May Limestone

Partly sunny this Morning, then clearing. Highs in the lower 80s. Light and variable Winds, becoming south around 5 Mph this afternoon.

Tonight 9 May Limestone

Mostly clear. Lows in the upper 60s. South Winds around 5 Mph.

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Old Union Temperature Statistics

May Temperature

Mexia Limestone County Airport (16.8 miles)

  • Lowest 2 May, 2026

    47.8 °F

  • Average May

    63.9 °F

  • Highest 5 May, 2026

    82.6 °F

Climate (2021–Present)

Mexia Limestone County Airport (16.8 miles)

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  • Average Low 2021–2026

    58.3 °F

  • Average 2021–2026

    68.2 °F

  • Average High 2021–2026

    79 °F
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