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Charleston weather in May 2025
Expect 27°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Charleston in May. Check more long-term weather averages for Charleston in May before you book your next holiday to South Carolina in 2025/2026.
- 2727°C max day temperature
- 9 hours of sunshine per day
- 99 days with some rainfall
- 1919°C min night temperature
- 1414 hours of daylight per day
- MModerate heat & humidity
- 9595 mm of monthly rainfall
- 99 (Very High) UV index
- 2222°C sea temperature
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Recommended for South Carolina
The May weather guide for South Carolina (Charleston) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Charleston in May?
Daytime temperatures usually reach 27°C in Charleston in May with moderate heat and humidity, falling to 19°C at night.
How sunny is it in Charleston in May?
There are normally 9 hours of bright sunshine each day in Charleston in May - that's 68% of daylight hours.
How warm is the sea around Charleston in May?
The average sea temperature around Charleston in May is 22°C.
Does it rain in Charleston in May?
There are usually 9 days with some rain in Charleston in May and the average monthly rainfall is 95mm.
Charleston May sunrise & sunset times
Browse the sunrise and sunset times for Charleston in May 2025. Select a month to view Charleston sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Thursday, 1st May 2025 | 05:32 | 19:02 |
Friday, 16th May 2025 | 05:20 | 19:13 |
Saturday, 31st May 2025 | 05:13 | 19:23 |
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