Charleston weather in June
June in Charleston: hot, rainy, with very humid — a good time to visit.
#10 of 12 months in Charleston · #483 of 604 destinations to visit in June · comfort 64/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Charleston climate normals — June
| Daytime high | 29°C / 83°F | 🥵 hot |
|---|---|---|
| Nighttime low | 23°C / 74°F | |
| Feels like (high) | 33°C / 91°F | |
| Rainfall | 136 mm / 5.3 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 21°C / 70°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 14.3 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 53 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Charleston in June — FAQ
- Is June a good time to visit Charleston?
- June in Charleston: hot, rainy, with very humid — a good time to visit. It ranks #10 of 12 months for Charleston on SeasonMap's comfort score (64/100).
- What is the weather like in Charleston in June?
- In June, Charleston averages a daily high of 28.6°C and a low of 23.1°C, with about 135.8 mm of rain over roughly 17 rainy days.
- What is the air quality in Charleston in June?
- Charleston has a mean US Air Quality Index of about 53 in June.