nomadseason

Monthly climate in Swansea, Wales, United Kingdom

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Swansea features a oceanic climate (Cfb). Temperatures typically range between 7 °C (45 °F) and 17 °C (62 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 24 °C (76 °F). The average annual precipitation amounts to about 1421 mm (55.9 inches) and receives 189 rainy days on the 1 mm (0.04 inches) threshold annually. Swansea enjoys an average of 3177 hours of sunshine throughout the year, and daylight varies from 7 hours 53 minutes to 16 hours 32 minutes per day.

Monthly average temperatures in Swansea, Wales, United Kingdom §

The warmest months in Swansea are July, August and September, with daily mean temperatures ranging from 15 to 17 °C (60 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 7 to 8 °C (45 - 46 °F) throughout the day. On average each year, Swansea experiences 0 days above 25 °C (77.0 °F) and 2 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, Wales, United Kingdom. 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 14°C
(57°F)		 13°C
(55°F)		 15°C
(59°F)		 17°C
(63°F)		 21°C
(70°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(75°F)		 24°C
(76°F)		 20°C
(68°F)		 16°C
(60°F)		 13°C
(55°F)
Mean maximum 11°C
(53°F)		 12°C
(53°F)		 13°C
(55°F)		 16°C
(61°F)		 18°C
(65°F)		 21°C
(70°F)		 23°C
(74°F)		 22°C
(72°F)		 21°C
(71°F)		 18°C
(64°F)		 14°C
(58°F)		 12°C
(55°F)
Average high 8°C
(47°F)		 9°C
(48°F)		 9°C
(49°F)		 11°C
(53°F)		 14°C
(57°F)		 17°C
(62°F)		 18°C
(65°F)		 18°C
(65°F)		 17°C
(63°F)		 14°C
(58°F)		 11°C
(53°F)		 9°C
(49°F)
Daily mean 7°C
(45°F)		 7°C
(45°F)		 8°C
(46°F)		 9°C
(49°F)		 12°C
(53°F)		 15°C
(59°F)		 17°C
(62°F)		 17°C
(62°F)		 15°C
(60°F)		 13°C
(55°F)		 10°C
(50°F)		 8°C
(47°F)
Average low 5°C
(42°F)		 6°C
(42°F)		 6°C
(43°F)		 7°C
(45°F)		 10°C
(50°F)		 13°C
(56°F)		 15°C
(59°F)		 15°C
(59°F)		 13°C
(57°F)		 11°C
(53°F)		 8°C
(47°F)		 7°C
(45°F)
Mean minimum 1°C
(35°F)		 1°C
(35°F)		 2°C
(36°F)		 3°C
(37°F)		 6°C
(42°F)		 10°C
(50°F)		 12°C
(54°F)		 12°C
(54°F)		 10°C
(50°F)		 7°C
(45°F)		 4°C
(39°F)		 3°C
(37°F)
Minimum -0°C
(32°F)		 -1°C
(30°F)		 -4°C
(25°F)		 2°C
(36°F)		 5°C
(40°F)		 9°C
(48°F)		 11°C
(52°F)		 12°C
(53°F)		 9°C
(48°F)		 3°C
(38°F)		 2°C
(35°F)		 2°C
(35°F)

Compare climate in Swansea with other places

Compare temperature, precipitation, sunshine, UV index in Swansea, Wales, United Kingdom with other places around the world.

Monthly average precipitation in Swansea, Wales, United Kingdom §

Swansea usually has the most precipitation in October, November and December, with an average of 19 rainy days and 170 mm (6.7 inches) of precipitation per month. The driest months in Swansea are April, May and July. On average, 75 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Swansea, Wales, United Kingdom. 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) 106 (4.2) 128 (5.0) 114 (4.5) 56 (2.2) 79 (3.1) 93 (3.6) 91 (3.6) 123 (4.8) 120 (4.7) 184 (7.2) 143 (5.6) 184 (7.3)
Average precipitation days (≥ 1 mm) 14 17 18 9 11 15 13 18 15 19 19 21

Monthly sunshine hours in Swansea, Wales, United Kingdom §

The sunniest months in Swansea are May, June and July, when the sun shines an average of 13 hours 10 minutes a day. Least sunny months in Swansea: January, November and December receive an average of 3 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Swansea, Wales, United Kingdom. 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 92 150 218 333 403 390 417 374 308 241 135 109
Mean daily daylight hours 8h 23m 9h 58m 11h 55m 13h 54m 15h 38m 16h 32m 16h 3m 14h 30m 12h 35m 10h 36m 8h 50m 7h 53m

Solar UV radiation in Swansea, Wales, United Kingdom §

Swansea experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 7 - 8, which corresponds to the High / Very High category of sun exposure. January, February and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Swansea UV Index data.

Average daily maximum UV levels by month for Swansea, Wales, United Kingdom. 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) 1 2 4 6 7 8 8 7 6 4 2 1

Detailed Monthly Weather Insights for Swansea, Wales, United Kingdom

Discover in-depth weather details for every month in Swansea. 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 Swansea'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.