Charleston weather in January
January in Charleston: cool, a little rain, with clean air — a great time to visit.
#7 of 12 months in Charleston · #232 of 604 destinations to visit in January · comfort 75/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Charleston climate normals — January
| Daytime high | 15°C / 60°F | 🙂 cool |
|---|---|---|
| Nighttime low | 8°C / 47°F | |
| Feels like (high) | 13°C / 55°F | |
| Rainfall | 71 mm / 2.8 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | 7°C / 44°F | |
| Sunshine | 7.3 h/day | |
| Daylight | 10.3 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Charleston in January — FAQ
- Is January a good time to visit Charleston?
- January in Charleston: cool, a little rain, with clean air — a great time to visit. It ranks #7 of 12 months for Charleston on SeasonMap's comfort score (75/100).
- What is the weather like in Charleston in January?
- In January, Charleston averages a daily high of 15.3°C and a low of 8.3°C, with about 71 mm of rain over roughly 8.2 rainy days.
- What is the air quality in Charleston in January?
- Charleston has a mean US Air Quality Index of about 38 in January.