Kiawah Island (SC) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Kiawah Island.
Climate overview of Kiawah Island
The climate in Kiawah Island, South Carolina, United States of America, is marked by large temperature swings across the seasons, ranging from 32°C (90°F) in July to 15°C (59°F) in January.
The city has a wet climate, receiving around 1202 mm (47 in) of rainfall per year. Despite the high annual total, it has very warm summers and mild winters. August is the wettest month. The sunniest month is May, with 9.8 hours of sunshine per day on average.
Kiawah Island Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kiawah Island - and find the best time to visit.
Monthly Temperature in Kiawah Island
In Kiawah Island, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 32°C (90°F) in July to a moderate 15°C (59°F) in January.
Nighttime temperatures range from 24°C (75°F) in July to 5°C (41°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Kiawah Island
Kiawah Island experiences significant rainfall throughout the year, averaging 1202 mm (47 in) of precipitation annually. The seasons in Kiawah Island bring significant changes in precipitation. The wettest month, August, receives heavy rainfall, with an average of 175 mm (6.9 in) of precipitation. This rainfall is distributed across 15 rainy days.
In contrast, the driest month, May, experiences much less rainfall, totaling 66 mm (2.6 in) over 7 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Kiawah Island Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Kiawah Island
In Kiawah Island, summer days are longer and more sunny, with daily sunshine hours peaking at 9.8 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 5.7 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Kiawah Island by Month
The relative humidity is high throughout the year in Kiawah Island.
The city experiences its highest humidity in August, reaching 79%. In February, the humidity drops to its lowest level at 67%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Kiawah Island
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: March, April, May and November
- Warmest weather: June, July and August
- Most sunshine: May and July
- Seasonal pattern: Very warm summers and mild winters
Frequently asked questions about the climate in Kiawah Island
What is the best time to visit Kiawah Island?
March, April, May and November typically offer the most optimal weather in Kiawah Island. In contrast, June, July and August tend to have less optimal conditions. Kiawah Island has very warm summers and mild winters.
What temperatures can I expect in Kiawah Island?
Daytime highs range from 15°C (59°F) in January to 32°C (90°F) in July. Nighttime lows range from 5°C (41°F) to 24°C (75°F). Temperatures vary considerably through the year.
How much rain does Kiawah Island get?
Annual rainfall is around 1202 mm (47 in). August is the wettest month with 175 mm (6.9 in), while May is the driest with 66 mm (2.6 in).
How sunny is Kiawah Island?
Kiawah Island receives around 2,810 hours of sunshine per year. May is the sunniest month with 295 hours, while December is the cloudiest with just 170 hours. Overall, Kiawah Island enjoys abundant sunshine.
Kiawah Island 3-Day Forecast
Kiawah Island on the map
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