Duncan, SC Weather & Growing Conditions
Overnight
70°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3am. Partly cloudy, with a low around 70. North northwest wind around 2 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Chance Showers And Thunderstorms | 2 mph NNW | 25% |
| Saturday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph NE | 35% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 2 to 6 mph NE | 43% |
| Sunday | 87°F | Patchy Fog then Chance Showers And Thunderstorms | 2 mph SE | 39% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 mph W | 35% |
| Monday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 3 mph SSW | 47% |
| Monday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph ENE | 68% |
| Tuesday | 81°F | Showers And Thunderstorms Likely | 3 to 7 mph NE | 66% |
| Tuesday Night | 64°F | Showers And Thunderstorms Likely | 8 to 12 mph NE | 66% |
| Wednesday | 75°F | Chance Rain Showers | 13 mph NE | 38% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms | 14 mph NE | 38% |
| Thursday | 76°F | Slight Chance Rain Showers then Partly Sunny | 12 mph NNE | 19% |
| Thursday Night | 60°F | Partly Cloudy | 6 to 9 mph NNE | 11% |
| Friday | 77°F | Mostly Sunny | 8 mph NNE | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Duncan, SC
Last spring frost
Mar 28
First fall frost
Nov 7
Growing season
224 days
Hardiness zone
8a
Explore more for Duncan, SC: full frost dates · planting calendar · South Carolina frost dates
Climate data from the nearest NOAA station, Greer, Sc (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.