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May Weather in Saint David, United States

Last updated: June 24, 2025

The average temperature in Saint David, United States during May is a comfortable 18°C (65°F). However, temperatures can vary widely, with a minimum dipping to 0°C (32°F) and a maximum soaring to 35°C (96°F). Be prepared for a fair amount of rain, as the region sees an average precipitation of 168 mm (6.6 in) over approximately 15 days. With an average humidity of 78%, you can expect a humid climate that adds to the local charm.

May Temperature in Saint David

In May in Saint David, the average temperature is 18°C (65°F). Maximums can reach 35°C (96°F), while minimums can drop as low as 0°C (32°F). This variation in temperature makes it essential for travelers to pack layers to stay comfortable throughout the day.

May Weather in Saint David: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Saint David, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint David, May typically has an average temperature of 18°C (65°F), with highs reaching up to 35°C (96°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec273042516474777570564135
Data source: Temperature data for Saint David 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 Saint David

In Saint David in May, the total precipitation amount is 168 mm (6.6 in) collected over a period of 15 days.

May Precipitation Trends in Saint David

The chart displays monthly precipitation patterns in Saint David, 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 Saint David, May typically receives around 168 mm (6.6 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec626812111316815210687721215953
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Saint David

In Saint David in May, humidity is 78%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel quite muggy and potentially uncomfortable, as it can leave you feeling sticky and fatigued more quickly than usual.

May Average Humidity in Saint David

This chart illustrates the average monthly humidity levels in Saint David, 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 Saint David is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%81%82%78%81%79%77%78%79%87%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Saint David

In Saint David 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 Saint David.

Maximum UV Index Levels in Saint David for May

The chart shows the monthly maximum UV Index (UVI) for Saint David 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 Saint David typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357810111098642
Data source: Saint David 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 Saint David Compares to Other Months

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

This table compares monthly weather conditions in Saint David, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)62 mm (2.4 inches)81%moderate
February Weather-1°C (30°F)68 mm (2.7 inches)81%moderate
March Weather6°C (42°F)121 mm (4.8 inches)81%high
April Weather11°C (52°F)113 mm (4.4 inches)82%very high
May Weather18°C (65°F)168 mm (6.6 inches)78%very high
June Weather24°C (75°F)152 mm (6.0 inches)81%extreme
July Weather25°C (78°F)106 mm (4.2 inches)79%very high
August Weather24°C (75°F)87 mm (3.4 inches)77%very high
September Weather21°C (70°F)72 mm (2.8 inches)78%very high
October Weather13°C (56°F)121 mm (4.8 inches)78%high
November Weather5°C (41°F)59 mm (2.3 inches)87%moderate
December Weather1°C (35°F)53 mm (2.1 inches)84%low

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