Charleston weather in June
Temperature, sea and sunshine in June: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in June
Good
Best time to visit: May – October
What is the weather like in Charleston in June?
In June, Charleston is hot: daytime highs average 29 °C, and even at night it stays warm at around 23 °C. The sea averages 26.5 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. It rains often – on about 16 days, adding up to 126 mm. On about 10 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, June is a good month for a holiday in Charleston.
June compared
How the weather changes from May to July. Tap a month to open it.
More details for June
- Daylight
- 14 h 18 min06:11 – 20:29
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 28 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 57 %on averageAll months
- Hot days
- 10 days30 °C or moreAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %78 %
- Few rainy daysweight 20 %16 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in June
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Charleston in June: quick answers
Is Charleston hot in June?
Yes. In June, Charleston is hot: daytime highs average 29 °C and nights stay around 23 °C. On about 10 days the thermometer climbs to 30 °C or more.
Can you swim in Charleston in June?
Yes. In June the sea averages 26.5 °C – lovely and warm for swimming.
Does it rain much in Charleston in June?
It rains often – on about 16 days, adding up to 126 mm.
Charleston month by month
The whole year in CharlestonAll destinations: USAWhere to go in JuneSea temperature in June
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences