Union Weather Forecast

    • 64
    • 89

    Sunny

    • 65
    • 90

    Increasing Clouds

    • 66
    • 91

    Mostly Sunny

    • 63
    • 88

    Rain Showers

    • 63
    • 80

    Rain Showers Likely

    • 64
    • 83

    Chance Thunderstorms

    • 65
    • 84

    Chance Thunderstorms

Today 18 May Union

Sunny. Near steady Temperatures in the upper 80s. South Winds around 5 Mph.

Tonight 18 May Union

Clear. Lows in the mid 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Temperature Statistics

May Temperature

Spartanburg Memorial (23 miles)

  • Lowest 4 May, 2026

    41 °F

  • Average May

    62.7 °F

  • Highest 10 May, 2026

    82.4 °F

Climate (2021–Present)

Spartanburg Memorial (23 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    71.9 °F
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