Charleston, SC Weather

73°F

Mostly Cloudy

Data: NOAA/National Weather Service. Forecast updated Oct 17, 2026, 6:30 AM UTC. Discussion issued Oct 16, 2026, 11:49 PM UTC.

Air Quality Index: 44 (Good)

Will it hit me? Next 2 hours in Charleston

No rain expected in the next 2 hours.

  1. · 1% · Mostly Cloudy
  2. · 1% · Partly Cloudy
  3. · 1% · Mostly Cloudy

No storms on track toward Charleston right now.

Hourly NWS forecast and radar storm motion. Times are local. Not an official warning; follow NWS.

Share: storm card image · live radar

Local discussion

  • Expect warm and dry weather this evening with temperatures in the mid to upper 80s.
  • A strong cold front will bring cooler temperatures and gusty winds this weekend.
  • Saturday will see highs in the mid to upper 60s, with lows dropping into the 40s inland.

Hazards

  • Wind: Gusty winds of 15-20 mph with gusts up to 30 mph; a Lake Wind Advisory is in effect. (Saturday morning through Sunday evening; across the area and Lake Moultrie)
  • Marine: Gale Warnings issued due to strong winds of 25-35 kt and hazardous seas up to 15 feet. (Saturday afternoon through Monday morning; marine zones out to 60 nm)
  • High Surf: High surf conditions expected with waves over 5 feet and a risk of beach erosion. (Sunday into Monday; area beaches)

Charleston, SC Climate Overview

Charleston, South Carolina, is classified as having a humid subtropical climate, characterized by hot, humid summers and mild to cool winters. This coastal city experiences a long growing season, with its climate heavily influenced by its proximity to the Atlantic Ocean.

In the summer, Charleston typically sees high temperatures ranging from the upper 80s to low 90s Fahrenheit, with lows in the mid-70s. Winters are mild, with average highs in the upper 50s to low 60s and lows in the 40s. Spring and fall serve as transitional seasons, featuring moderate temperatures and comfortable conditions.

Charleston receives an average annual rainfall of about 50 inches. The wettest months are typically June through September, coinciding with the Atlantic hurricane season, while the driest months are usually November and April. Snowfall is rare, given the region’s mild winters, and when it does occur, it is usually minimal.

The city is susceptible to hurricanes and tropical storms, primarily from late summer through early fall, due to its location along the southeastern coast of the United States. These storms can bring heavy rainfall, flooding, and significant wind damage. Charleston's low elevation and coastal position make it particularly vulnerable to storm surges and flooding.

Geographically, Charleston is situated at sea level on a coastal plain, which influences its weather patterns. The surrounding ocean moderates temperatures, reducing extremes but increasing humidity. This geographic context plays a crucial role in the city’s climate, contributing to its lush, green environment.