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Monthly climate in Kiawah Island, South Carolina, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Kiawah Island features a humid subtropical climate (Cfa). Temperatures typically range between 12 °C (54 °F) and 27 °C (82 °F) through the year, but rarely can drop to -2 °C (28 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 1363 mm (53.7 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually. Kiawah Island enjoys an average of 3405 hours of sunshine throughout the year, and daylight varies from 10 hours 1 minutes to 14 hours 14 minutes per day.

Monthly average temperatures in Kiawah Island, South Carolina, United States §

The warmest months in Kiawah Island are July, August and September, with daily mean temperatures ranging from 26 to 27 °C (79 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 14 °C (54 - 57 °F) throughout the day. On average each year, Kiawah Island experiences 117 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Kiawah Island, South Carolina, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 20°C
(69°F)		 20°C
(69°F)		 22°C
(71°F)		 26°C
(79°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(87°F)		 30°C
(87°F)		 31°C
(88°F)		 29°C
(85°F)		 26°C
(78°F)		 22°C
(72°F)
Mean maximum 19°C
(67°F)		 19°C
(66°F)		 21°C
(70°F)		 24°C
(75°F)		 27°C
(80°F)		 28°C
(83°F)		 30°C
(86°F)		 30°C
(86°F)		 30°C
(86°F)		 27°C
(81°F)		 24°C
(75°F)		 20°C
(69°F)
Average high 14°C
(58°F)		 16°C
(60°F)		 17°C
(63°F)		 20°C
(69°F)		 24°C
(75°F)		 27°C
(80°F)		 28°C
(83°F)		 28°C
(83°F)		 27°C
(81°F)		 25°C
(76°F)		 19°C
(66°F)		 16°C
(61°F)
Daily mean 12°C
(54°F)		 14°C
(57°F)		 15°C
(60°F)		 19°C
(66°F)		 23°C
(74°F)		 26°C
(79°F)		 27°C
(82°F)		 27°C
(82°F)		 26°C
(79°F)		 23°C
(74°F)		 17°C
(63°F)		 14°C
(57°F)
Average low 10°C
(50°F)		 12°C
(54°F)		 14°C
(57°F)		 17°C
(64°F)		 22°C
(72°F)		 25°C
(77°F)		 26°C
(80°F)		 26°C
(80°F)		 25°C
(77°F)		 22°C
(71°F)		 15°C
(59°F)		 12°C
(54°F)
Mean minimum 2°C
(35°F)		 5°C
(41°F)		 5°C
(42°F)		 10°C
(50°F)		 15°C
(60°F)		 21°C
(70°F)		 24°C
(75°F)		 24°C
(75°F)		 21°C
(70°F)		 14°C
(58°F)		 8°C
(46°F)		 5°C
(41°F)
Minimum -2°C
(28°F)		 3°C
(38°F)		 3°C
(38°F)		 6°C
(44°F)		 13°C
(56°F)		 18°C
(66°F)		 23°C
(74°F)		 23°C
(74°F)		 17°C
(63°F)		 9°C
(48°F)		 4°C
(39°F)		 1°C
(34°F)

Compare climate in Kiawah Island with other places

Compare temperature, precipitation, sunshine, UV index in Kiawah Island, South Carolina, United States with other places around the world.

Monthly average precipitation in Kiawah Island, South Carolina, United States §

Kiawah Island usually has the most precipitation in July, August and September, with an average of 16 rainy days and 186 mm (7.3 inches) of precipitation per month. The driest months in Kiawah Island are January, March and May. On average, 66 mm (2.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Kiawah Island, South Carolina, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 58 (2.3) 81 (3.2) 64 (2.5) 91 (3.6) 75 (2.9) 111 (4.4) 159 (6.2) 209 (8.2) 191 (7.5) 85 (3.4) 103 (4.1) 137 (5.4)
Average precipitation days (≥ 1 mm) 7 10 6 7 7 16 16 20 13 10 8 9

Monthly sunshine hours in Kiawah Island, South Carolina, United States §

The sunniest months in Kiawah Island are May, June and July, when the sun shines an average of 11 hours 0 minutes a day. Least sunny months in Kiawah Island: January, February and December receive an average of 6 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Kiawah Island, South Carolina, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 192 219 284 313 341 327 344 318 303 291 247 222
Mean daily daylight hours 10h 16m 11h 1m 12h 0m 13h 0m 13h 50m 14h 14m 14h 1m 13h 16m 12h 19m 11h 19m 10h 27m 10h 1m

Solar UV radiation in Kiawah Island, South Carolina, United States §

Kiawah Island experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Kiawah Island UV Index data.

Average daily maximum UV levels by month for Kiawah Island, South Carolina, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 7 9 10 11 11 11 11 10 8 6 4

Detailed Monthly Weather Insights for Kiawah Island, South Carolina, United States

Discover in-depth weather details for every month in Kiawah Island. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Kiawah Island's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.