Weather in Barnwell, SC
Updated 2026-09-26 13:30 local time · ZIP codes 29812
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
78°0% rain80°1% rain81°1% rain
81°2% rain81°1% rain79°1% rain73°1% rain
70°1% rain68°1% rain67°1% rain66°1% rain65°1% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 2%).
It feels like 71°F with winds near 7 mph.
70°F, 1% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 9 mph.
Current temperature is 78°F, wind 7 mph, rain chance up to 2%.
UV index is 7. Sunscreen, shade and protective clothing are recommended.
Local weather characteristics in Barnwell
South Carolina has hot humid summers and generally mild winters. Coastal areas are exposed to tropical systems, while the northwest is somewhat cooler with elevation.
Barnwell is part of the South weather region. The forecast point is near 33.24°N latitude and 81.36°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Barnwell weather today
Sunny and 78°F in Barnwell, SC. Today's high is 81°F with a 1% rain chance. Winds are around 7 mph with gusts near 8 mph. Relative humidity is 20%, pressure is 29.99 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Barnwell
Sunrise is at 07:16 AM and sunset is at 07:17 PM. Tomorrow's forecast calls for Sunny with a high near 85°F and a low near 58°F. The maximum rain chance is 3%.