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Monthly climate in Swansea, South Carolina, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Swansea features a humid subtropical climate (Cfa).Temperatures typically range between 9 °C (49 °F) and 27 °C (82 °F) through the year, but rarely can drop to -9 °C (16 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 1251 mm (49.2 inches) and receives 125 rainy days on the 1 mm (0.04 inches) threshold annually.Swansea enjoys an average of 3211 hours of sunshine throughout the year, and daylight varies from 9 hours 55 minutes to 14 hours 21 minutes per day.

Monthly average temperatures in Swansea, South Carolina, United States §

The warmest months in Swansea are June, July and August, 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 9 to 12 °C (49 - 54 °F) throughout the day. On average each year, Swansea experiences 176 days above 25 °C (77.0 °F) and 20 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Swansea, 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 27°C
(81°F)		 29°C
(85°F)		 32°C
(89°F)		 33°C
(92°F)		 38°C
(101°F)		 38°C
(101°F)		 38°C
(100°F)		 36°C
(97°F)		 37°C
(99°F)		 38°C
(100°F)		 30°C
(86°F)		 28°C
(83°F)
Mean maximum 24°C
(76°F)		 27°C
(81°F)		 30°C
(86°F)		 32°C
(89°F)		 35°C
(95°F)		 35°C
(95°F)		 36°C
(98°F)		 36°C
(97°F)		 35°C
(95°F)		 33°C
(92°F)		 28°C
(83°F)		 24°C
(76°F)
Average high 15°C
(59°F)		 18°C
(65°F)		 21°C
(70°F)		 25°C
(77°F)		 29°C
(85°F)		 31°C
(88°F)		 33°C
(91°F)		 32°C
(90°F)		 31°C
(88°F)		 26°C
(80°F)		 19°C
(67°F)		 16°C
(61°F)
Daily mean 9°C
(49°F)		 12°C
(54°F)		 15°C
(58°F)		 19°C
(66°F)		 23°C
(74°F)		 26°C
(79°F)		 27°C
(82°F)		 27°C
(81°F)		 25°C
(77°F)		 20°C
(69°F)		 13°C
(55°F)		 10°C
(51°F)
Average low 4°C
(40°F)		 7°C
(44°F)		 9°C
(48°F)		 12°C
(54°F)		 18°C
(64°F)		 21°C
(71°F)		 23°C
(74°F)		 23°C
(73°F)		 20°C
(69°F)		 15°C
(60°F)		 7°C
(45°F)		 5°C
(42°F)
Mean minimum -5°C
(23°F)		 -3°C
(26°F)		 -3°C
(27°F)		 2°C
(36°F)		 8°C
(47°F)		 16°C
(60°F)		 19°C
(67°F)		 18°C
(65°F)		 13°C
(56°F)		 5°C
(42°F)		 -2°C
(29°F)		 -4°C
(25°F)
Minimum -9°C
(16°F)		 -5°C
(24°F)		 -4°C
(24°F)		 -1°C
(31°F)		 6°C
(43°F)		 13°C
(55°F)		 16°C
(61°F)		 16°C
(61°F)		 10°C
(51°F)		 1°C
(34°F)		 -3°C
(27°F)		 -6°C
(21°F)

Compare climate in Swansea with other places

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

Monthly average precipitation in Swansea, South Carolina, United States §

Swansea usually has the most precipitation in July, August and December, with an average of 14 rainy days and 141 mm (5.6 inches) of precipitation per month.The driest months in Swansea are March, October and November. On average, 69 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Swansea, 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) 83 (3.3) 100 (3.9) 76 (3.0) 112 (4.4) 105 (4.2) 121 (4.8) 154 (6.1) 141 (5.6) 98 (3.9) 71 (2.8) 61 (2.4) 129 (5.1)
Average precipitation days (≥ 1 mm) 9 9 9 8 10 14 17 16 8 8 7 10

Monthly sunshine hours in Swansea, South Carolina, United States §

The sunniest months in Swansea are May, June and July, when the sun shines an average of 10 hours 32 minutes a day.Least sunny months in Swansea: January, February and December receive an average of 6 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Swansea, 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 174 186 256 289 312 313 344 311 294 280 242 206
Mean daily daylight hours 10h 10m 10h 58m 11h 59m 13h 2m 13h 55m 14h 21m 14h 7m 13h 20m 12h 20m 11h 17m 10h 23m 9h 55m

Solar UV radiation in Swansea, South Carolina, United States §

Swansea 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 Swansea UV Index data.

Average daily maximum UV levels by month for Swansea, 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 8 10 11 11 11 11 9 8 6 4