Duncan, SC Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Duncan, SC in one place.
A chance of rain showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Local Weather Overview
This forecast page for Duncan, 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: Jul 12, 2026 1:43 AM EDT.
The active forecast window currently covers Jul 14 to Jul 18, 2026 for Duncan, SC.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 18, 2026
- Latest sync
- Jul 12, 2026 1:43 AM EDT
- Forecast office
- GSP
- Source
- NOAA / NWS
Daily Outlook
This Week in Duncan
Friday looks like the warmest upcoming period in Duncan at 91 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 68 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 9 mph NE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 12, 2026 1:43 AM EDT
- Coverage
- 5 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
Showers and thunderstorms likely before 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Mostly sunny, with a high near 88.
Mostly clear, with a low around 71.
Sunny, with a high near 90.
Mostly clear, with a low around 73.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Chance Showers And Thunderstorms
|
82°F |
5 to 9 mph
NE
|
|
Tuesday Night
Jul 14
|
Showers And Thunderstorms Likely
|
68°F |
0 to 5 mph
NNE
|
|
Wednesday
Jul 15
|
Mostly Sunny
|
88°F |
0 to 3 mph
WSW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
71°F |
5 mph
W
|
|
Thursday
Jul 16
|
Sunny
|
90°F |
5 mph
N
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
73°F |
1 to 5 mph
WNW
|
|
Friday
Jul 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
91°F |
5 mph
N
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms
|
73°F |
5 mph
WNW
|
|
Saturday
Jul 18
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
91°F |
2 to 6 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Duncan.