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May Weather in St. George, Canada

Last updated: June 18, 2025

In May, the average temperature in St. George, Canada hovers around 14°C (57°F). Temperatures can vary significantly, with a minimum of -4°C (26°F) and a maximum of 32°C (91°F). Expect a total precipitation of 97 mm (3.8 in) over approximately 12 days, and prepare for a notable average humidity of 82%.

May Temperature in St. George

In May in St. George, the average temperature is 14°C (57°F). The maximum can reach 32°C (91°F) and the minimum can be as low as -4°C (26°F). It's advisable to pack for a wide range of temperatures to ensure a comfortable trip.

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

The chart illustrates May temperature patterns in St. George, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. George, May typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (91°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec242533435666727063523730
Data source: Temperature data for St. 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 St. George

In St. George in May, the precipitation amount is 97 mm (3.8 in) spread over 12 days.

May Precipitation Trends in St. George

The chart displays monthly precipitation patterns in St. 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 St. George, May typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec70746598971038290711007571
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in St. George

In St. George in May, humidity is 82%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making outdoor activities uncomfortable and travel more challenging due to the heavy, damp air.

May Average Humidity in St. George

This chart illustrates the average monthly humidity levels in St. 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 St. George is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%88%87%83%81%79%80%81%84%88%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in St. George

In St. George in May, 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 St. George.

Maximum UV Index Levels in St. George for May

The chart shows the monthly maximum UV Index (UVI) for St. 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 St. George typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997542
Data source: St. 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 St. George Compares to Other Months

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

This table compares monthly weather conditions in St. George, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)70 mm (2.7 inches)90%low
February Weather-4°C (26°F)74 mm (2.9 inches)90%moderate
March Weather1°C (33°F)65 mm (2.6 inches)87%moderate
April Weather6°C (44°F)98 mm (3.9 inches)87%very high
May Weather14°C (57°F)97 mm (3.8 inches)82%very high
June Weather19°C (67°F)103 mm (4.1 inches)81%very high
July Weather22°C (72°F)82 mm (3.2 inches)79%very high
August Weather21°C (70°F)90 mm (3.5 inches)80%very high
September Weather17°C (63°F)71 mm (2.8 inches)81%high
October Weather11°C (52°F)100 mm (3.9 inches)84%moderate
November Weather3°C (38°F)75 mm (3.0 inches)88%moderate
December Weather-1°C (30°F)70 mm (2.8 inches)87%low

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