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May Weather in Saint Elmo, United States

Last updated: June 24, 2025

In May, the average temperature in Saint Elmo, United States hovers around 20°C (67°F), with a comfortable range from a brisk 3°C (37°F) to a warm 34°C (94°F). Expect 153 mm (6.0 in) of precipitation over about 14 days, accompanied by an average humidity of 80%, making it a notably humid month. Prepare accordingly for a mix of weather as you explore this vibrant locale!

May Temperature in Saint Elmo

In May in Saint Elmo, the average temperature is 20°C (67°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 3°C (37°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!

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

The chart illustrates May temperature patterns in Saint Elmo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Elmo, May typically has an average temperature of 20°C (67°F), with highs reaching up to 34°C (94°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec323546556776797672594338
Data source: Temperature data for Saint Elmo 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 Elmo

In Saint Elmo in May, the total precipitation amount is 153 mm (6.0 in) spread over 14 days.

May Precipitation Trends in Saint Elmo

The chart displays monthly precipitation patterns in Saint Elmo, 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 Elmo, May typically receives around 153 mm (6.0 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec828613412615310799105651168875
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Saint Elmo

In Saint Elmo in May, humidity is 80%. With an average temperature of 20°C (67°F), this humidity feels like a warm embrace that can make outdoor activities feel sticky and heavy, potentially draining your energy as you explore.

May Average Humidity in Saint Elmo

This chart illustrates the average monthly humidity levels in Saint Elmo, 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 Elmo is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Saint Elmo

In Saint Elmo in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Saint Elmo.

Maximum UV Index Levels in Saint Elmo for May

The chart shows the monthly maximum UV Index (UVI) for Saint Elmo 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 Elmo typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357911111098643
Data source: Saint Elmo 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 Elmo Compares to Other Months

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

This table compares monthly weather conditions in Saint Elmo, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)82 mm (3.2 inches)84%moderate
February Weather2°C (35°F)86 mm (3.4 inches)82%moderate
March Weather8°C (46°F)134 mm (5.3 inches)84%high
April Weather13°C (55°F)126 mm (5.0 inches)83%very high
May Weather20°C (67°F)153 mm (6.0 inches)80%extreme
June Weather25°C (77°F)107 mm (4.2 inches)83%extreme
July Weather26°C (79°F)99 mm (3.9 inches)82%very high
August Weather24°C (76°F)105 mm (4.2 inches)82%very high
September Weather22°C (72°F)65 mm (2.6 inches)79%very high
October Weather15°C (59°F)116 mm (4.5 inches)79%high
November Weather6°C (43°F)88 mm (3.5 inches)88%moderate
December Weather3°C (38°F)75 mm (2.9 inches)87%moderate

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