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June Weather in Swansea, United States

Last updated: June 24, 2025

In June, the average temperature in Swansea, United States hovers around 20°C (68°F), providing a comfortable climate. However, temperatures can vary significantly, dipping as low as 8°C (47°F) and soaring up to 34°C (93°F). Expect approximately 97 mm (3.8 in) of precipitation spread over 11 days, with an average humidity level of 78%, making for a uniquely vibrant and lush atmosphere.

June Temperature in Swansea

In June, in Swansea, the average temperature is 20°C (68°F). Maximum temperatures can reach 34°C (93°F), while the minimum can drop as low as 8°C (47°F). This makes Swansea an ideal destination for travelers seeking a comfortable climate for outdoor activities and exploration.

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

The chart illustrates June 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, June typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (47°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.

June Precipitation in Swansea

In Swansea in June, the total precipitation amount is 97 mm (3.8 in) over the course of 11 days.

June Precipitation Trends in Swansea

The chart displays monthly precipitation patterns in Swansea, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Swansea, June typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7492102123101971229297135101120
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Swansea

In Swansea in June humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

June Average Humidity in Swansea

This chart illustrates the average monthly humidity levels in Swansea, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Swansea is approximately 78%, 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 June generated using information from the Copernicus Climate Change Service.

June UV Index in Swansea

In Swansea in June, 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 June

The chart shows the monthly maximum UV Index (UVI) for Swansea in June, 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 June, the maximum UV index in Swansea typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
Data source: Swansea June 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 June 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 June’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 June’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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