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May Weather in Port Royal, United States

Last updated: June 24, 2025

In May, the average temperature in Port Royal, United States hovers around 17°C (62°F). However, be prepared for a range of temperatures, with minimums dropping to -1°C (30°F) and maximums soaring up to 32°C (90°F). Expect approximately 120 mm (4.7 in) of precipitation spread across 14 days, while the average humidity sits at a comfortable 80%.

May Temperature in Port Royal

In May in Port Royal, the average temperature is 17°C (62°F). Maximums can reach 32°C (90°F), while minimums can drop as low as -1°C (30°F). This variability makes it essential for travelers to pack for both warm and cool conditions.

May Weather in Port Royal: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Port Royal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Royal, May typically has an average temperature of 17°C (62°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec313441516270767467574236
Data source: Temperature data for Port Royal 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.

May Precipitation in Port Royal

In Port Royal in May, the precipitation amount is 120 mm (4.7 in) over the course of 14 days.

May Precipitation Trends in Port Royal

The chart displays monthly precipitation patterns in Port Royal, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Port Royal, May typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec65105941021201011211021291138591
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Port Royal

In Port Royal in May, humidity is 80%. With an average temperature of 17°C (62°F), this humidity feels like a heavy blanket wrapping around you, making travel sticky and uncomfortable, and often leaving you longing for a refreshing breeze.

May Average Humidity in Port Royal

This chart illustrates the average monthly humidity levels in Port Royal, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Port Royal is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Port Royal

In Port Royal in May, 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 Port Royal.

Maximum UV Index Levels in Port Royal for May

The chart shows the monthly maximum UV Index (UVI) for Port Royal in May, 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 May, the maximum UV index in Port Royal typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Port Royal May 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 May Weather in Port Royal Compares to Other Months

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

This table compares monthly weather conditions in Port Royal, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)65 mm (2.6 inches)89%moderate
February Weather1°C (34°F)104 mm (4.1 inches)90%moderate
March Weather5°C (41°F)94 mm (3.7 inches)89%high
April Weather11°C (51°F)102 mm (4.0 inches)88%very high
May Weather17°C (62°F)120 mm (4.7 inches)80%very high
June Weather21°C (71°F)101 mm (4.0 inches)79%very high
July Weather24°C (76°F)121 mm (4.8 inches)74%very high
August Weather23°C (74°F)102 mm (4.0 inches)64%very high
September Weather20°C (68°F)129 mm (5.1 inches)67%very high
October Weather14°C (57°F)113 mm (4.5 inches)81%high
November Weather6°C (42°F)85 mm (3.3 inches)89%moderate
December Weather2°C (36°F)91 mm (3.6 inches)88%low

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