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May Weather in Saint George, United States

Last updated: June 24, 2025

In May, the average temperature in Saint George, United States is a pleasant 19°C (66°F). However, be prepared for a temperature range that can drop to a cool 3°C (38°F) or soar up to a scorching 37°C (98°F). During this month, expect 187 mm (7.4 in) of precipitation spread over approximately 14 days, contributing to a high average humidity of 82%. Enjoy the climate, but don't forget your umbrella!

May Temperature in Saint George

In May in Saint George, the average temperature is 19°C (66°F), with maximums reaching up to 37°C (98°F) and minimums dropping as low as 3°C (38°F). This makes it an ideal time for travelers to enjoy both warm days and cooler evenings.

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

The chart illustrates May temperature patterns in Saint George, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint George, May typically has an average temperature of 19°C (66°F), with highs reaching up to 37°C (98°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec313246546578817772564437
Data source: Temperature data for Saint George 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 George

In Saint George in May, the total precipitation amount is 187 mm (7.4 in) over the course of 14 days.

May Precipitation Trends in Saint George

The chart displays monthly precipitation patterns in Saint George, 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 George, May typically receives around 187 mm (7.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec32298869187868112169983428
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Saint George

In Saint George in May humidity is 82%. With an average temperature of 19°C (66°F), this humidity feels like a warm blanket wrapping around you, making it slightly uncomfortable for traveling as you might find yourself constantly seeking shade or a cool breeze.

May Average Humidity in Saint George

This chart illustrates the average monthly humidity levels in Saint George, 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 George is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Saint George

In Saint George 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 George.

Maximum UV Index Levels in Saint George for May

The chart shows the monthly maximum UV Index (UVI) for Saint George 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 George typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Saint George 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 George Compares to Other Months

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

This table compares monthly weather conditions in Saint George, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)32 mm (1.3 inches)76%moderate
February Weather0°C (32°F)29 mm (1.1 inches)77%moderate
March Weather8°C (46°F)88 mm (3.5 inches)70%high
April Weather12°C (54°F)69 mm (2.7 inches)73%very high
May Weather19°C (66°F)187 mm (7.4 inches)82%very high
June Weather26°C (78°F)86 mm (3.4 inches)82%extreme
July Weather27°C (81°F)81 mm (3.2 inches)81%extreme
August Weather25°C (77°F)121 mm (4.7 inches)78%very high
September Weather22°C (73°F)69 mm (2.7 inches)71%very high
October Weather14°C (57°F)98 mm (3.8 inches)71%high
November Weather7°C (44°F)34 mm (1.3 inches)81%moderate
December Weather3°C (37°F)28 mm (1.1 inches)84%moderate

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