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Hourly Forecast
Daylight Hours
06:40
Sunrise
18:52
Sunset
Moon
Waxing Crescent
12:30
Moonrise
21:02
Moonset
Daily Forecast
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Friday
Saturday
Sunday
Monday
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Air Quality Data Available
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UV Index
Humidity
Weather in Charleston today, September 16, 2026
Expect a mostly clear day in Charleston on September 16, 2026, with sunshine dominating from morning through evening. Cloud should stay limited, so the overall feel remains bright and settled. Expect a grey start, with morning cloud around 100% by 07:00. Outdoor plans early on should not rely on bright skies.
The temperature range runs from about 22°C up to 34°C. Relative humidity sits between 45% and 94%, reaching its peak around 07:00. A lighter breeze peaks around 16:00 near 3.4 km/h.
Through the afternoon cloud remains the main feature, with cover near 100% around 23:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 15.8 km, briefly nearer 13.3 km. Daylight runs from 06:40 to 18:52, lasting 12 hours 11 minutes of sunlight today.
Taken together, settled sunshine in Charleston on September 16, 2026 makes outdoor timing easier, with highs near 34°C.
Frequently asked questions about weather in Charleston
How warm does it get in Charleston?
The warmest month in Charleston is July, with average high temperatures of 30°C. The average temperature during this period is around 25°C.
How cold does it get in Charleston?
The coldest month in Charleston is January, with average low temperatures of -4°C. The average temperature during this period is around -1°C.
What is the wettest time of year in Charleston?
The wettest month in Charleston is July, with an average of 139mm of precipitation.
What is the driest time of year in Charleston?
The driest month in Charleston is December, with an average of 68mm of precipitation.
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