Weather WorldUnion County, SC Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Union County Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  | | |  |  |  | |  | | | |
| Mostly Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Chance of Showers | Showers | Showers | Showers Likely | Chance of Showers | Partly Cloudy | Sunny |
| Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 70°FHi: 21°C | Lo: 60°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C |
| POP: 80% | POP: 70% | POP: 70% | POP: 70% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 411 PM EDT Wed Sep 30 2026 
Union County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Union County Weather Map
Union County Quick Facts
Union County Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 237 PM EDT Wed Sep 30 2026
Key Messages
1. Well above normal temperatures and dry conditions stick around for most locations through Friday, outside of the potential for a few showers and thunderstorms in the mountains Friday afternoon/evening. 2. A cold front combined with cold air damming will bring cooler temperatures and widespread rain chances over the weekend, especially Saturday night into Sunday. Locally heavy rainfall is possible but confidence is low. 3. Drier early next week with a brief warm up expected Monday ...