Summer temperatures · South Carolina
How hot does Charleston get in summer?
Charleston right now
56°FClear skies
- Today56°F / 41°FClear skies
- Tomorrow57°F / 34°FClear skies
- Monday58°F / 39°FClouds
Look in the mirror. That's how dull today is.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical summer, June to August, Charleston averages highs around 90°F and lows around 72°F.
About 64 days a year reach 90°F or hotter, and about one reaches 100°F. About 178 days a year get to 80°F or warmer. That makes it the 25th hottest summer of the 129 US cities we track.
Last updated
The hottest high in the forecast for the next 48 hours is about 58°F.
Charleston’s summer lows average about 72°F, so a sunset walk along the Battery comes with the full sauna experience at no extra charge.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 90°F |
|---|---|
| Average summer low | 72°F |
| Days a year at 80°F or warmer | 178 |
| Days a year at 90°F or hotter | 64 |
| Days a year at 100°F or hotter | 1 |
| Average winter high, for comparison | 62°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Jackson, Mississippi: highs around 91°F, lows around 71°F
- Fresno, California: highs around 95°F, lows around 67°F
- Honolulu, Hawaii: highs around 88°F, lows around 75°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00013880.