Weather World
City of Union, SCUnion, SC Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Union Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  | | | | | |  |  | | |  |
| Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers |
| Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C |
| POP: 40% | POP: 40% | POP: 50% | POP: 50% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 633 PM EDT Mon Sep 07 2026 
Union Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Union Weather Map
Union Quick Facts
Union Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 728 PM EDT Mon Sep 7 2026
Key Messages
1. Quiet weather through tonight. 2. Relatively dry and warm temps through midweek. Temps increase for the second half of the week, with a return of daily chances of showers and thunderstorms.
Discussion
... Key message 1: Quiet weather through tonight.
Well defined upper trough is present off the Atlantic coast while a deep upper ridge is centered in the Plains. At the surface, high pressure centered over the Great Lakes this afternoon extends down the Eastern Seaboard in wedge-like fa...