Union Weather Forecast

    • 66
    • 81

    Thunderstorms Likely

    • 67
    • 82

    Chance Thunderstorms

    • 63
    • 86

    Slight Chance Thunderstorms

    • 60
    • 80

    Rain Showers Likely

    • 56
    • 73

    Rain Showers Likely

    • 54
    • 72

    Chance Thunderstorms

Today 26 May Union

Mostly cloudy. Patchy fog in the morning. Showers and Thunderstorms likely in the afternoon. Humid with Highs in the lower 80s. Southwest Winds around 5 Mph. Chance of rain 60 percent.

Tonight 26 May Union

Mostly cloudy. Showers and Thunderstorms likely in the Evening, then a chance of Showers after midnight. Lows in the mid 60s. South Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 70 percent.

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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

    65.6 °F

  • Highest 20 May, 2026

    89.6 °F

Climate (2021–Present)

Spartanburg Memorial (23 miles)

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  • Average Low 2021–2026

    51.2 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    71.9 °F
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