Union Weather Forecast

    • 71
    • 93

    Slight Chance Thunderstorms

    • 70
    • 85

    Chance Thunderstorms

    • 70
    • 87

    Slight Chance Thunderstorms

    • 69
    • 86

    Chance Thunderstorms

    • 68
    • 81

    Chance Thunderstorms

    • 68
    • 80

    Chance Thunderstorms

Today 18 Aug Union

Sunny with Highs in the lower 90s. Light and variable Winds. Heat index Values up to 100.

Tonight 18 Aug Union

Mostly clear. Lows in the lower 70s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Temperature Statistics

August Temperature

Spartanburg Memorial (23 miles)

  • Lowest 5 August, 2025

    62.6 °F

  • Average August

    72.4 °F

  • Highest 1 August, 2025

    93.2 °F

Climate (2020–Present)

Spartanburg Memorial (23 miles)

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  • Average Low 2020–2025

    51.2 °F

  • Average 2020–2025

    60.8 °F

  • Average High 2020–2025

    71.6 °F
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