Weather forecast for: Barnwell SC
Last Update: 12:51 am EDT Sep 11, 2026
Overnight: Mostly cloudy, with a low around 73. Calm wind.
Friday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 93. Heat index values as high as 102. Light and variable wind. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am, then a slight chance of showers and thunderstorms after 5am. Patchy fog between 10pm and 3am. Otherwise, partly cloudy, with a low around 73. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday: A chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 92. Light and variable wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 92. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Monday: Mostly sunny, with a high near 93.
Monday Night: Mostly clear, with a low around 72.
Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Tuesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Wednesday: Mostly sunny, with a high near 89.
Wednesday Night: Mostly clear, with a low around 68.
Thursday: Sunny, with a high near 90.
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City of Barnwell, SC
