Union Weather Forecast

    • 73
    • 95

    Mostly Sunny

    • 72
    • 94

    Mostly Sunny

    • 72
    • 95

    Slight Chance Thunderstorms

    • 69
    • 93

    Rain Showers Likely

    • 68
    • 88

    Chance Thunderstorms

    • 68
    • 90

    Mostly Sunny

Today 18 Aug Union

Sunny, hot with Highs in the mid 90s. Northwest Winds around 5 Mph. Heat index Values up to 102.

Tonight 18 Aug Union

Mostly clear. Lows in the lower 70s. Light and variable Winds, becoming north around 5 Mph after midnight.

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Union Temperature Statistics

August Temperature

Spartanburg Memorial (23 miles)

  • Lowest 1 August, 2026

    68 °F

  • Average August

    77.8 °F

  • Highest 15 August, 2026

    95 °F

Climate (2021–2026)

Spartanburg Memorial (23 miles)

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  • Average Low 2021–2026

    51.2 °F

  • Average 2021–2026

    61.1 °F

  • Average High 2021–2026

    72 °F
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