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August Weather in Swansea, United States

Last updated: June 24, 2025

In August, the average temperature in Swansea, United States hovers around 23°C (74°F). Expect a comfortable range with minimums dipping to 11°C (52°F) and maximums reaching up to 34°C (94°F). The weather is relatively wet, with 92 mm (3.6 in) of precipitation spread over 11 days and an average humidity of 76%.

August Temperature in Swansea

In August in Swansea, the average temperature is 23°C (74°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 11°C (52°F). This climate makes Swansea an ideal destination for travelers seeking warm weather with pleasant evenings.

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 23°C (74°F), with highs reaching up to 34°C (94°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec333539485868747367574536
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.

August Precipitation in Swansea

In Swansea in August, the precipitation amount is 92 mm (3.6 in) spread over 11 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 92 mm (3.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7492102123101971229297135101120
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Swansea

In Swansea in August humidity is 76%. With an average temperature of 23°C (74°F), this humidity feels like a warm, thick blanket wrapping around you, making outdoor exploration feel a bit sluggish and requiring frequent breaks for hydration and respite from the heat.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
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.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)74 mm (2.9 inches)84%moderate
February Weather1°C (35°F)92 mm (3.6 inches)84%moderate
March Weather4°C (39°F)102 mm (4.0 inches)82%high
April Weather9°C (49°F)123 mm (4.9 inches)79%very high
May Weather15°C (58°F)101 mm (4.0 inches)75%very high
June Weather20°C (68°F)97 mm (3.8 inches)78%very high
July Weather23°C (74°F)122 mm (4.8 inches)76%very high
August Weather23°C (74°F)92 mm (3.6 inches)76%very high
September Weather19°C (67°F)97 mm (3.8 inches)75%very high
October Weather14°C (57°F)135 mm (5.3 inches)75%high
November Weather7°C (45°F)101 mm (4.0 inches)80%moderate
December Weather2°C (36°F)120 mm (4.7 inches)80%low

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