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April Weather in Swansea, United States

Last updated: June 24, 2025

In April, the average temperature in Swansea, United States is a mild 13°C (56°F). However, be prepared for a range of temperatures, as it can drop to a chilly -4°C (25°F) or reach a warm 31°C (88°F). Rain is a possibility, with precipitation measuring around 148 mm (5.8 in) spread over 11 days, and the air often feels quite humid, with an average humidity of 80%.

April Temperature in Swansea

In April in Swansea, the average temperature is 13°C (56°F). The maximum can reach 31°C (88°F), and the minimum can be as low as -4°C (25°F). This diverse temperature range makes Swansea an exciting destination for travelers seeking both warm and cool experiences.

April Weather in Swansea: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Swansea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Swansea, April typically has an average temperature of 13°C (56°F), with highs reaching up to 31°C (88°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647566877807773604539
Data source: Temperature data for Swansea generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Swansea

In Swansea in April, the precipitation amount is 148 mm (5.8 in) spread over a duration of 11 days.

April Precipitation Trends in Swansea

The chart displays monthly precipitation patterns in Swansea, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Swansea, April typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec808313914815810091129591077767
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Swansea

In Swansea in April humidity is 80%. With average temperature 13°C (56°F) this humidity feels like a damp chill that seeps into your bones, making outdoor exploration more challenging and necessitating layered clothing for comfort.

April Average Humidity in Swansea

This chart illustrates the average monthly humidity levels in Swansea, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Swansea is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Swansea

In Swansea in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Swansea.

Maximum UV Index Levels in Swansea for April

The chart shows the monthly maximum UV Index (UVI) for Swansea in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Swansea typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109753
Data source: Swansea April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How April Weather in Swansea Compares to Other Months

Weather in Swansea varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Swansea, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Swansea, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)80 mm (3.2 inches)82%moderate
February Weather2°C (36°F)83 mm (3.3 inches)80%moderate
March Weather9°C (48°F)139 mm (5.5 inches)80%high
April Weather13°C (56°F)148 mm (5.8 inches)80%very high
May Weather20°C (68°F)158 mm (6.2 inches)82%very high
June Weather25°C (77°F)100 mm (4.0 inches)83%extreme
July Weather27°C (80°F)91 mm (3.6 inches)81%very high
August Weather25°C (77°F)129 mm (5.1 inches)80%very high
September Weather23°C (73°F)59 mm (2.3 inches)76%very high
October Weather15°C (60°F)107 mm (4.2 inches)76%high
November Weather7°C (45°F)77 mm (3.0 inches)85%moderate
December Weather4°C (40°F)67 mm (2.7 inches)86%moderate

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