Union, SC Weather Forecast
Local 7-day forecast
Patchy Fog then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Union, SC in one place.
Patchy fog before 9am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 85. South southwest wind 1 to 6 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Union, SC is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Aug 2, 2026 8:11 PM EDT.
The active forecast window currently covers Aug 3 to Aug 9, 2026 for Union, SC.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 3 to Aug 9, 2026
- Latest sync
- Aug 2, 2026 8:11 PM EDT
- Forecast office
- GSP
- Source
- NOAA / NWS
Daily Outlook
This Week in Union
Friday looks like the warmest upcoming period in Union at 87 degrees F.
Monday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Monday at about 1 to 6 mph SSW.
Precipitation is mentioned in 13 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 2, 2026 8:11 PM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- GSP
- Radar station
- KGSP
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 69. West wind around 2 mph. Chance of precipitation is 20%.
A chance of rain showers between 9am and 11am, then showers and thunderstorms. Partly sunny, with a high near 84. East wind around 2 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 69. Northeast wind around 1 mph. Chance of precipitation is 80%.
A chance of rain showers before 11am, then showers and thunderstorms likely. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.
Showers and thunderstorms likely before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 50%.
A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 50%.
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 50%.
A slight chance of rain showers between 8am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Aug 3
|
Patchy Fog then Slight Chance Showers And Thunderstorms
|
85°F |
1 to 6 mph
SSW
|
|
Monday Night
Aug 3
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
69°F |
2 mph
W
|
|
Tuesday
Aug 4
|
Showers And Thunderstorms
|
84°F |
2 mph
E
|
|
Tuesday Night
Aug 4
|
Showers And Thunderstorms
|
69°F |
1 mph
NE
|
|
Wednesday
Aug 5
|
Showers And Thunderstorms Likely
|
85°F |
0 to 3 mph
S
|
|
Wednesday Night
Aug 5
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
70°F |
1 mph
W
|
|
Thursday
Aug 6
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
86°F |
0 to 3 mph
SSW
|
|
Thursday Night
Aug 6
|
Chance Showers And Thunderstorms
|
70°F |
2 mph
W
|
|
Friday
Aug 7
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
87°F |
0 to 3 mph
SSW
|
|
Friday Night
Aug 7
|
Chance Showers And Thunderstorms
|
70°F |
1 mph
W
|
|
Saturday
Aug 8
|
Partly Sunny then Chance Showers And Thunderstorms
|
87°F |
0 to 3 mph
E
|
|
Saturday Night
Aug 8
|
Chance Showers And Thunderstorms
|
70°F |
1 mph
E
|
|
Sunday
Aug 9
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
86°F |
2 mph
SSE
|
Nearby Forecasts
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