Union Weather Forecast

    • 67
    • 82

    Rain Showers

    • 68
    • 84

    Rain Showers Likely

    • 69
    • 86

    Rain Showers Likely

    • 69
    • 87

    Chance Thunderstorms

    • 69
    • 88

    Chance Thunderstorms

    • 70
    • 89

    Chance Thunderstorms

Today 4 Aug Union

Patchy fog this morning. Partly sunny with a chance of Thunderstorms. A chance of Showers this Morning, then Showers this afternoon. Highs in the lower 80s. Northeast Winds around 5 Mph. Chance of rain 80 percent.

Tonight 4 Aug Union

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the upper 60s. Northeast Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 70 percent.

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Union Temperature Statistics

August Temperature

Spartanburg Memorial (23 miles)

  • Lowest 1 August, 2026

    68 °F

  • Average August

    76.2 °F

  • Highest 1 August, 2026

    89.6 °F

Climate (2021–2026)

Spartanburg Memorial (23 miles)

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  • Average Low 2021–2026

    51.2 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    71.9 °F
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