Duncan, SC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Duncan, a town in Spartanburg County, South Carolina.
Today
83°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1pm, then showers and thunderstorms between 1pm and 4pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 83. East northeast wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Duncan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Chance Showers And Thunderstorms | 6 mph ENE | 78% |
| Tonight | 67°F | Chance Showers And Thunderstorms | 2 to 6 mph NE | 60% |
| Wednesday | 84°F | Showers And Thunderstorms | 5 mph ESE | 81% |
| Wednesday Night | 68°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 73% |
| Thursday | 86°F | Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 7 mph WSW | 58% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms | 0 to 6 mph SW | 53% |
| Friday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 6 mph SSW | 44% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph SSW | 43% |
| Saturday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 6 mph WSW | 30% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 30% |
| Sunday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph WSW | 31% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 1 to 5 mph WSW | 31% |
| Monday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 5 mph SW | 24% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph WSW | 24% |
Forecast source: National Weather Service (api.weather.gov) for Duncan (34.929, -82.148). Updated through the day.
Growing snapshot for Duncan
Last spring frost
Mar 28
First fall frost
Nov 7
Growing season
224 days
Hardiness zone
8a
More local growing data for Duncan: nearby ZIP 29334 weather · frost dates · planting calendar · South Carolina frost dates
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Climate data from the nearest NOAA station, Greer, Sc (5.6 mi from Duncan). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.