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May Weather in St Marys, United States

Last updated: June 24, 2025

In May, the average temperature in St Marys, United States hovers around 24°C (75°F). Expect a minimum of 13°C (55°F) and a maximum of 35°C (95°F), creating a pleasant climate for various activities. However, be prepared for some rain, as the area sees about 80 mm (3.2 in) of precipitation over 10 days. The average humidity during this time is a comfortable 72%, making it an ideal time to explore the region!

May Temperature in St Marys

In May in St Marys, the average temperature is 24°C (75°F). Maximums can reach 35°C (95°F) and minimums can be as low as 13°C (55°F). This pleasant weather makes it an ideal time for outdoor activities and exploring the vibrant surroundings.

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

The chart illustrates May temperature patterns in St Marys, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St Marys, May typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (95°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec566064697579818180756459
Data source: Temperature data for St Marys 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 Marys

In St Marys in May, the precipitation amount is 80 mm (3.2 in) over a span of 10 days.

May Precipitation Trends in St Marys

The chart displays monthly precipitation patterns in St Marys, 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 Marys, May typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec5171446680145170172155788086
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in St Marys

In St Marys in May, humidity is 72%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket wrapped around you, making any travel plans feel pleasantly sticky but still enjoyable as long as you stay hydrated and take breaks in the shade.

May Average Humidity in St Marys

This chart illustrates the average monthly humidity levels in St Marys, 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 Marys is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%79%78%73%72%74%82%82%83%79%82%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in St Marys

In St Marys 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 St Marys.

Maximum UV Index Levels in St Marys for May

The chart shows the monthly maximum UV Index (UVI) for St Marys 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 Marys typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579101111111110864
Data source: St Marys 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 Marys Compares to Other Months

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

This table compares monthly weather conditions in St Marys, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)51 mm (2.0 inches)84%moderate
February Weather16°C (61°F)71 mm (2.8 inches)79%high
March Weather18°C (64°F)44 mm (1.7 inches)78%very high
April Weather21°C (69°F)66 mm (2.6 inches)72%very high
May Weather24°C (75°F)80 mm (3.2 inches)72%extreme
June Weather26°C (80°F)145 mm (5.7 inches)74%extreme
July Weather27°C (81°F)170 mm (6.7 inches)82%extreme
August Weather27°C (82°F)172 mm (6.8 inches)82%extreme
September Weather26°C (80°F)155 mm (6.1 inches)83%very high
October Weather24°C (75°F)78 mm (3.1 inches)79%very high
November Weather18°C (64°F)80 mm (3.1 inches)82%high
December Weather15°C (59°F)86 mm (3.4 inches)85%moderate

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