| NWS Forecast for: Union County Issued by: National Weather Service Greenville-Spartanburg, SC Last Update: 410 PM EDT Mon Jul 20 2026 | |
| Tonight: Mostly cloudy with a chance of showers and thunderstorms this evening, then partly cloudy after midnight. Lows in the mid 70s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Tuesday: Mostly sunny. Hot with highs in the mid 90s. Southwest winds 10 to 15 mph. Heat index values up to 103. Tuesday Night: Mostly cloudy. Lows in the mid 70s. Southwest winds 10 to 15 mph. Wednesday: Partly sunny. Showers and thunderstorms likely in the afternoon. Humid with highs in the lower 90s. Southwest winds around 15 mph with gusts up to 25 mph. Chance of rain 70 percent. Heat index values up to 101. Wednesday Night: Showers. Thunderstorms likely, mainly in the evening. Lows around 70. Southwest winds 5 to 10 mph. Chance of rain near 100 percent. Thursday: Showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 90 percent. Thursday Night: A chance of thunderstorms. Showers likely. Lows in the mid 60s. Chance of rain 70 percent. Friday: Partly sunny. Showers likely in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 60 percent. Friday Night: Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 60 percent. Saturday: Mostly cloudy. Showers likely in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 60 percent. Saturday Night: A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 50 percent. Sunday: Partly sunny with a chance of showers. Highs in the upper 80s. Chance of rain 40 percent. Sunday Night: A chance of showers in the evening. Mostly clear. Lows around 70. Chance of rain 30 percent. Monday: Sunny. Highs in the lower 90s. Heat index values up to 100 in the afternoon. | |
| Zone Forecast: Union County | |
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