August Weather in Swansea, United States

Last updated: June 24, 2025

In August, the average temperature in Swansea, United States reaches a warm 27°C (81°F), making it a delightful time to visit. Expect temperatures to range from a comfortable minimum of 16°C (61°F) to a sizzling maximum of 36°C (97°F). However, don't forget your umbrella, as the region sees an average precipitation of 141 mm (5.6 in) over 16 days, accompanied by relatively high humidity at 81%.

August Temperature in Swansea

In August in Swansea, the average temperature is 27°C (81°F). Maximums can reach 36°C (97°F), and minimums can drop to as low as 16°C (61°F). Be prepared for warm days and cooler evenings while traveling to Swansea during this time.

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

The chart illustrates August 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, August typically has an average temperature of 27°C (81°F), with highs reaching up to 36°C (97°F) and lows dropping to around 16°C (61°F).

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

August Precipitation in Swansea

In Swansea in August, the precipitation amount is 141 mm (5.6 in) over the course of 16 days.

August Precipitation Trends in Swansea

The chart displays monthly precipitation patterns in Swansea, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Swansea, August typically receives around 141 mm (5.6 inches) of precipitation spread over approximately 16 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Swansea

In Swansea in August humidity is 81%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy blanket enveloping you, making travel quite uncomfortable as it can quickly drain your energy and require frequent hydration breaks.

August Average Humidity in Swansea

This chart illustrates the average monthly humidity levels in Swansea, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Swansea is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Swansea

In Swansea in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Swansea.

Maximum UV Index Levels in Swansea for August

The chart shows the monthly maximum UV Index (UVI) for Swansea in August, 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 August, the maximum UV index in Swansea typically reaches 11, which falls under the extreme exposure category.

Data source: Swansea August 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 August 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 August’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 August’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