| NWS Forecast for: Barnwell SC Issued by: National Weather Service Columbia, SC Last Update: 2:21 am EDT Aug 19, 2026 | |
| This Afternoon: Mostly sunny and hot, with a high near 37. Heat index values as high as 40. Calm wind. Tonight: Mostly clear, with a low around 23. Calm wind. Thursday: Sunny and hot, with a high near 37. Heat index values as high as 40. Calm wind. Thursday Night: A slight chance of showers and thunderstorms before 2am. Mostly clear, with a low around 23. Calm wind. Chance of precipitation is 20%. Friday: Showers and thunderstorms likely after 2pm. Mostly sunny and hot, with a high near 37. Calm wind. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible. Friday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 22. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible. Saturday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 34. Chance of precipitation is 50%. Saturday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 22. Chance of precipitation is 30%. Sunday: Mostly sunny, with a high near 35. Sunday Night: Mostly clear, with a low around 22. Monday: Sunny, with a high near 35. Monday Night: Partly cloudy, with a low around 22. Tuesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 35. Chance of precipitation is 30%. | |
| Barnwell SC 33.23°N 81.36°W (Elev. 207 m) | |
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