Swansea
United Kingdom
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Swansea, United Kingdom

January, like December, is another chilly winter month in Swansea, United Kingdom, with temperature in the range of an average low of 4°C (39.2°F) and an average high of 8°C (46.4°F). In Swansea, the average high-temperature is relatively the same as in December - a still frosty 8°C (46.4°F). Weather in January »
The last month of the winter, February, is also a frosty month in Swansea, United Kingdom, with average temperature ranging between min 3.6°C (38.5°F) and max 7.8°C (46°F). February is the coldest month, with an average high-temperature of 7.8°C (46°F) and an average low-temperature of 3.6°C (38.5°F). Weather in February »

March, the first month of the spring, in Swansea, is still a chilly month, with average temperature varying between 4.8°C (40.6°F) and 9.5°C (49.1°F). In Swansea, United Kingdom, the average high-temperature in March is almost the same as in February - a still chilly 9.5°C (49.1°F). Weather in March »

April is a cool spring month in Swansea, United Kingdom, with temperature in the range of an average high of 11.9°C (53.4°F) and an average low of 6.3°C (43.3°F). In Swansea, the average high-temperature is relatively the same as in March - a fresh 11.9°C (53.4°F). Weather in April »

The last month of the spring, May, is a moderate month in Swansea, United Kingdom, with average temperature ranging between max 15°C (59°F) and min 9.2°C (48.6°F). In May, the average high-temperature marginally rises, from a cool 11.9°C (53.4°F) in April, to a mild 15°C (59°F). Weather in May »

June, the first month of the summer, in Swansea, is a comfortable month, with average temperature fluctuating between 17.7°C (63.9°F) and 11.8°C (53.2°F). In Swansea, the average high-temperature is almost the same as in May - an enjoyable 17.7°C (63.9°F). Weather in June »

July, like June, in Swansea, United Kingdom, is another enjoyable summer month, with average temperature ranging between min 13.9°C (57°F) and max 19.6°C (67.3°F). In Swansea, the average high-temperature in July is almost the same as in June - a still enjoyable 19.6°C (67.3°F). Weather in July »

August, the last month of the summer, in Swansea, is also an enjoyable month, with average temperature ranging between min 14°C (57.2°F) and max 19.7°C (67.5°F). August is the warmest month, with an average high-temperature of 19.7°C (67.5°F) and an average low-temperature of 14°C (57.2°F). Weather in August »

The first month of the autumn, September, is still a comfortable month in Swansea, United Kingdom, with average temperature fluctuating between 12.4°C (54.3°F) and 17.8°C (64°F). In September, the average high-temperature is essentially the same as in August - a still enjoyable 17.8°C (64°F). Weather in September »

October, the same as September, in Swansea, United Kingdom, is another mild autumn month, with average temperature varying between 9.9°C (49.8°F) and 14.4°C (57.9°F). In October, the average high-temperature marginally drops, from an enjoyable 17.8°C (64°F) in September, to a mild 14.4°C (57.9°F). Weather in October »

November, the last month of the autumn, in Swansea, is another cool month, with average temperature varying between 6.9°C (44.4°F) and 11.1°C (52°F). In November, the average high-temperature slightly decreases, from a moderate 14.4°C (57.9°F) in October, to a cool 11.1°C (52°F). Weather in November »

December, the first month of the winter, in Swansea, is also a frosty month, with average temperature fluctuating between 8.7°C (47.7°F) and 4.7°C (40.5°F). In December, the average high-temperature is essentially the same as in November - a frosty 8.7°C (47.7°F). Weather in December »

How much does it rain in Swansea?

Throughout the year, in Swansea, United Kingdom, there are 201 rainfall days, and 999.2mm (39.3") of precipitation is accumulated.

What is the month with the least sunshine in Swansea?

Months with the least sunshine are January, November and December, with an average of 2h of sunshine.

What is the coldest month in Swansea?

With an average high-temperature of 7.8°C (46°F) and an average low-temperature of 3.6°C (38.5°F), February is the coldest month in Swansea.

What month is the sea coldest in Swansea?

March is the month with the coldest seawater in Swansea, with an average sea temperature of 8.3°C (46.9°F).

What is the driest month in Swansea?

April is the month with the least rainfall. Rain falls for 14 days and accumulates 58.5mm (2.3") of precipitation.

What are the months with the most sunshine in Swansea?

Months with the most sunshine are May and June, with an average of 7h of sunshine.

When are the longest days in Swansea?

With an average of 16.6h of daylight, June has the longest days of the year in Swansea, United Kingdom.

What are the months with the highest UV index in Swansea?

Months with the highest UV index in Swansea, United Kingdom, are June through August, with an average maximum UV index of 6.

What is the warmest month in Swansea?

The warmest month is August, with an average high-temperature of 19.7°C (67.5°F) and an average low-temperature of 14°C (57.2°F).

What is the month with the warmest sea water in Swansea?

The month with the warmest seawater is August, with an average sea temperature of 16.8°C (62.2°F).

What is the wettest month in Swansea?

October is the month with the most rainfall in Swansea, United Kingdom. Rain falls for 19 days and accumulates 123.1mm (4.8") of precipitation.

What is the month with the shortest days in Swansea?

December has the shortest days of the year in Swansea, with an average of 7.9h of daylight.

When is the lowest UV index in Swansea?

With an average maximum UV index of 0, December is the month with the lowest UV index.
Average temperature - Swansea, United Kingdom
Average rainfall - Swansea, United Kingdom

The wettest month (with the highest rainfall) is October (123.1mm).
The driest month (with the lowest rainfall) is April (58.5mm).

Average rainfall days - Swansea, United Kingdom

Months with the highest number of rainy days are January, November and December (20 days).
The month with the lowest number of rainy days is July (13 days).

Average sea temperature - Swansea, United Kingdom

The best month for swimming (with the highest average sea temperature) is August (16.8°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).

Average daylight / Average sunshine - Swansea, United Kingdom