North Charleston (SC) Weather & Climate: Best Time to Visit

In North Charleston, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 33°C (91°F) in July to a moderate 15°C (59°F) in January.

Nighttime temperatures range from 23°C (73°F) in July to 3°C (37°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

North Charleston experiences significant rainfall throughout the year, averaging 1442 mm (57 in) of precipitation annually. The seasons in North Charleston bring significant changes in precipitation. The wettest month, August, receives heavy rainfall, with an average of 197 mm (7.8 in) of precipitation. This rainfall is distributed across 16 rainy days.

In contrast, the driest month, January, experiences much less rainfall, totaling 76 mm (3 in) over 10 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our North Charleston Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In North Charleston, summer days are longer and more sunny, with daily sunshine hours peaking at 9.8 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 5.7 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in North Charleston.

The city experiences its highest humidity in August, reaching 79%. In February, the humidity drops to its lowest level at 67%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year