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May Weather in Saint Clair, United States

Last updated: June 24, 2025

In Saint Clair, United States, the average temperature in May hovers around 14°C (58°F). Temperatures can vary significantly, with a minimum of -1°C (30°F) and a maximum of 32°C (89°F). During this month, expect about 105 mm (4.1 in) of precipitation spread over approximately 15 days, accompanied by an average humidity level of 80%.

May Temperature in Saint Clair

In May in Saint Clair, the average temperature is 14°C (58°F). Maximum temperatures can reach as high as 32°C (89°F), while minimum temperatures can drop to as low as -1°C (30°F). This diverse temperature range makes Saint Clair an interesting destination for travelers seeking both warm and cool experiences.

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

The chart illustrates May temperature patterns in Saint Clair, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Clair, May typically has an average temperature of 14°C (58°F), with highs reaching up to 32°C (89°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec272836455768747266544033
Data source: Temperature data for Saint Clair 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 Clair

In Saint Clair in May, the total precipitation amount is 105 mm (4.1 in) over a span of 15 days.

May Precipitation Trends in Saint Clair

The chart displays monthly precipitation patterns in Saint Clair, 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 Clair, May typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec70737097105938280771138263
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Saint Clair

In Saint Clair in May humidity is 80%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities sweltering and uncomfortable for travel.

May Average Humidity in Saint Clair

This chart illustrates the average monthly humidity levels in Saint Clair, 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 Clair is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Saint Clair

In Saint Clair 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 Saint Clair.

Maximum UV Index Levels in Saint Clair for May

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

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

This table compares monthly weather conditions in Saint Clair, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)70 mm (2.8 inches)88%low
February Weather-2°C (29°F)73 mm (2.9 inches)87%moderate
March Weather2°C (36°F)70 mm (2.7 inches)85%moderate
April Weather7°C (46°F)97 mm (3.8 inches)86%very high
May Weather14°C (58°F)105 mm (4.1 inches)80%very high
June Weather20°C (69°F)93 mm (3.6 inches)80%very high
July Weather23°C (74°F)82 mm (3.2 inches)80%very high
August Weather22°C (73°F)80 mm (3.2 inches)80%very high
September Weather19°C (66°F)77 mm (3.0 inches)80%high
October Weather12°C (55°F)113 mm (4.5 inches)84%moderate
November Weather4°C (40°F)82 mm (3.2 inches)89%moderate
December Weather0°C (33°F)63 mm (2.5 inches)86%low

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