Union Weather Forecast

    • 58
    • 83

    Slight Chance Thunderstorms

    • 65
    • 87

    Mostly Sunny

    • 47
    • 83

    Slight Chance Rain Showers

    • 46
    • 64

    Slight Chance Rain

    • 50
    • 65

    Slight Chance Rain

    • 58
    • 76

    Partly Sunny

Today 21 Mar Union

Partly sunny this Morning, then clearing. Highs in the mid 80s. West Winds around 5 Mph.

Tonight 21 Mar Union

Partly cloudy. Lows in the upper 50s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union Temperature Statistics

March Temperature

Spartanburg Memorial (23 miles)

  • Lowest 19 March, 2026

    30.2 °F

  • Average March

    58.4 °F

  • Highest 11 March, 2026

    84.2 °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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