Union County, SC Weather Forecast
County weather hub
Sunny
Compare major city weather across Union County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 90. Wind around 0 mph.
County Weather Overview
This county weather page brings together forecast coverage for Union County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 0 of 0 mapped cities in Union County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 17, 2026 6:25 PM EDT
- Forecast office
- GSP
- Source
- NOAA / NWS
Daily Outlook
This Week in Union County
Friday looks like the warmest upcoming period in Union County at 94 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Wednesday at about 5 to 8 mph NE.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 17, 2026 6:25 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
Clear, with a low around 68. Wind around 0 mph.
Sunny, with a high near 94. North northeast wind around 1 mph.
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 69. Wind around 0 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Northeast wind around 2 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 11pm, then a chance of showers and thunderstorms between 11pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Mostly sunny, with a high near 88.
A slight chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 68.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
A chance of rain showers before 2pm, then showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
A slight chance of rain showers before 8am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 73.
A slight chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 61.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Sep 17
|
Sunny
|
90°F |
0 mph
|
|
Tonight
Sep 17
|
Clear
|
68°F |
0 mph
|
|
Friday
Sep 18
|
Sunny
|
94°F |
1 mph
NNE
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms
|
69°F |
0 mph
|
|
Saturday
Sep 19
|
Mostly Sunny then Chance Showers And Thunderstorms
|
88°F |
2 mph
NE
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
68°F |
1 mph
NE
|
|
Sunday
Sep 20
|
Mostly Sunny
|
88°F |
0 mph
|
|
Sunday Night
Sep 20
|
Slight Chance Showers And Thunderstorms
|
68°F |
0 mph
|
|
Monday
Sep 21
|
Mostly Sunny then Chance Showers And Thunderstorms
|
89°F |
1 mph
ESE
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
67°F |
1 mph
ENE
|
|
Tuesday
Sep 22
|
Showers And Thunderstorms Likely
|
84°F |
0 to 3 mph
NE
|
|
Tuesday Night
Sep 22
|
Showers And Thunderstorms Likely
|
64°F |
1 to 5 mph
NE
|
|
Wednesday
Sep 23
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
73°F |
5 to 8 mph
NE
|
|
Wednesday Night
Sep 23
|
Slight Chance Showers And Thunderstorms then Mostly Cloudy
|
61°F |
3 to 7 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Union County.
Nearby forecast pages are not available for this location yet.
Coverage
Forecast coverage currently spans 0 of 0 mapped cities in Union County.
