| NWS Forecast for: Union County Issued by: National Weather Service Greenville-Spartanburg, SC Last Update: 730 PM EDT Tue Jul 21 2026 |  |
| Tonight: Mostly cloudy. Lows in the mid 70s. Southwest winds 5 to 10 mph. Wednesday: Mostly sunny. A chance of showers in the afternoon. Humid with highs in the lower 90s. Southwest winds 5 to 10 mph. Gusts up to 25 mph in the afternoon. Chance of rain 30 percent. Wednesday Night: A chance of thunderstorms. Showers with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 90 percent. Thursday: Showers likely with a chance of thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. Humid with highs in the lower 80s. Southwest winds around 5 mph, becoming northwest around 5 mph in the afternoon. Chance of rain 90 percent. Thursday Night: Showers. Thunderstorms likely, mainly in the evening. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 90 percent. Friday: Showers. A chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 80 percent. Friday Night: Showers with a chance of thunderstorms. Lows in the upper 60s. Chance of rain 80 percent. Saturday: Showers. Thunderstorms likely in the afternoon. Highs around 80. Chance of rain 80 percent. Saturday Night: Mostly cloudy. Showers with thunderstorms likely in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 80 percent. Sunday: Mostly sunny. Highs in the upper 80s. Sunday Night: Mostly clear. Lows in the lower 70s. Monday: Sunny. Highs in the lower 90s. Heat index values up to 100. Monday Night: Partly cloudy. Lows in the lower 70s. Tuesday: Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100. | |
| Zone Forecast: Union County | |
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