Union Weather Forecast

    • 59
    • 90

    Partly Sunny

    • 44
    • 69

    Becoming Sunny

    • 42
    • 73

    Sunny

    • 47
    • 72

    Mostly Sunny

    • 53
    • 82

    Mostly Sunny

    • 56
    • 85

    Mostly Sunny

    • 60
    • 86

    Partly Sunny

Today 18 Apr Union

Sunny. Near steady Temperatures around 90. Southwest Winds 5 to 10 Mph.

Tonight 18 Apr Union

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the upper 50s. Southwest Winds 5 to 10 Mph.

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Union Temperature Statistics

April Temperature

Spartanburg Memorial (23 miles)

  • Lowest 9 April, 2026

    37.4 °F

  • Average April

    64.3 °F

  • Highest 15 April, 2026

    87.8 °F

Climate (2021–Present)

Spartanburg Memorial (23 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    60.9 °F

  • Average High 2021–2026

    71.8 °F
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