Weather WorldBarnwell County, SC 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Barnwell County, SC Weather Forecast
Barnwell County, SC Weather Forecast Date: 308 AM EDT Tue Sep 22 2026
The area/counties/county of: Barnwell, including the cities of: Barnwell, Williston, and Blackville.or toggle through each period.
Today... Mostly sunny. Patchy fog this morning. A chance of showers and thunderstorms this afternoon. Highs around 90. Northeast winds around 5 mph. Chance of rain 40%.
Tonight... Mostly cloudy. A chance of showers and thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Patchy fog. Lows around 70. East winds around 5 mph. Chance of rain 50%.
Wednesday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the lower 80s. Northeast winds 5 to 10 mph.
Wednesday Night... Mostly cloudy. Lows in the mid 60s. Northeast winds 5 to 10 mph with gusts up to 25 mph.
Thursday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 70s. Northeast winds 5 to 10 mph with gusts up to 20 mph.
Thursday Night... Mostly cloudy in the evening, then clearing. Lows in the upper 50s.
Friday... Sunny. Highs in the upper 70s.
Friday Night... Mostly clear. Lows in the upper 50s.
Saturday... Sunny. Highs in the lower 80s.
Saturday Night... Mostly clear. Lows in the mid 50s.
Sunday... Sunny. Highs in the lower 80s.
Sunday Night... Partly cloudy. Lows in the upper 50s.
POP = Probability of Precipitation
Barnwell County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...