April Weather in Swansea, United States

Last updated: June 24, 2025

In April, the average temperature in Swansea, United States is a comfortable 19°C (66°F). However, be prepared for a range of temperatures: it can drop to a chilly -1°C (31°F) at night, while daytime highs can soar up to 33°C (92°F). Visitors can expect about 112 mm (4.4 in) of precipitation over 8 days, contributing to an average humidity of 79%—perfect for lush landscapes but potentially challenging for outdoor activities!

April Temperature in Swansea

In April in Swansea, the average temperature is 19°C (66°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as -1°C (31°F). This variety in temperatures makes Swansea an ideal destination for travelers looking to experience a wide range of weather conditions.

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 19°C (66°F), with highs reaching up to 33°C (92°F) and lows dropping to around -1°C (31°F).

Data source: Temperature data for Swansea generated using information from the Copernicus Climate Change Service.

April Precipitation in Swansea

In Swansea in April, the total precipitation amount is 112 mm (4.4 in) spread over 8 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 112 mm (4.4 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Swansea

In Swansea in April humidity is 79%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, making it feel much warmer than the actual temperature and creating a heavy, sticky atmosphere that can be a bit uncomfortable for traveling.

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 79%, offering insight into how humid the weather typically is during this month.

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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	83 mm (3.3 inches)	86%	moderate
February Weather	12°C (54°F)	100 mm (3.9 inches)	81%	high
March Weather	15°C (58°F)	76 mm (3.0 inches)	81%	very high
April Weather	19°C (66°F)	112 mm (4.4 inches)	79%	very high
May Weather	23°C (74°F)	105 mm (4.2 inches)	75%	extreme
June Weather	26°C (79°F)	121 mm (4.8 inches)	75%	extreme
July Weather	27°C (82°F)	154 mm (6.1 inches)	80%	extreme
August Weather	27°C (81°F)	141 mm (5.6 inches)	81%	extreme
September Weather	25°C (77°F)	98 mm (3.9 inches)	83%	very high
October Weather	20°C (69°F)	71 mm (2.8 inches)	78%	very high
November Weather	13°C (55°F)	61 mm (2.4 inches)	85%	high
December Weather	10°C (51°F)	129 mm (5.1 inches)	87%	moderate