Weather in Charleston: July
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Average day temperature: | 89.5°F |
| Average night temperature: | 78.3°F | |
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Sea water temperature: | 83.7°F |
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Number of sunny days: | 13 days |
| Day length: | 13.8 - 14.3 hours | |
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Number of rainy days: | 8 days |
| Precipitation totals: | 4.5 in. | |
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forecast
| Charleston |
temperature
| Charleston |
Air temperature in July, °F
The highest day temperature during July of 2025 was 102°F. At the same time the lowest night temperature was 76°F. Daily and nightly averages during July were 91.3°F and 79.6°F.
Sea water temperature in Charleston in July, °F
The average sea water temperature in July of 2025 was 84.7°F. The highest and lowest sea temperatures during the month were 86.9°F and 82.6°F.
Mostly all days in July are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in July, in.
Precipitation total value in Charleston in July is 4.8 in. Other months of the year show relatively similar values.
The average wind speed value in July is 7.8 mph It makes July one of the least windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in July is: 7.7.
Best time for vacation in Charleston
Charleston on a weather map
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