Weather in Johnston, SC
Updated 2026-09-26 12:45 local time · ZIP codes 29832
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
73°0% rain78°1% rain
79°4% rain80°1% rain79°1% rain78°1% rain74°1% rain
69°1% rain69°1% rain68°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 4%).
It feels like 67°F with winds near 6 mph.
69°F, 1% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 9 mph.
Current temperature is 73°F, wind 6 mph, rain chance up to 4%.
UV index is 6. Sunscreen, shade and protective clothing are recommended.
Local weather characteristics in Johnston
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.
Johnston is part of the South weather region. The forecast point is near 33.83°N latitude and 81.80°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.
Johnston weather today
Sunny and 73°F in Johnston, SC. Today's high is 80°F with a 1% rain chance. Winds are around 6 mph with gusts near 7 mph. Relative humidity is 25%, pressure is 30.03 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Johnston
Sunrise is at 07:18 AM and sunset is at 07:18 PM. Tomorrow's forecast calls for Overcast with a high near 82°F and a low near 58°F. The maximum rain chance is 4%.