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May Weather in Mercer, United States

Last updated: June 24, 2025

In May, the average temperature in Mercer, United States hovers around 16°C (60°F). Expect a wide range in temperatures, with a minimum of -2°C (29°F) and a maximum soaring to 31°C (89°F). During this month, 149 mm (5.9 in) of precipitation falls over approximately 16 days, contributing to a notable average humidity of 81%.

May Temperature in Mercer

In May in Mercer, the average temperature is 16°C (60°F). Maximums can reach 31°C (89°F), while minimums can dip as low as -2°C (29°F). This wide range of temperatures makes it essential for travelers to be prepared for both warm and chilly conditions.

May Weather in Mercer: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Mercer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercer, May typically has an average temperature of 16°C (60°F), with highs reaching up to 31°C (89°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec283138486068737165554034
Data source: Temperature data for Mercer 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 Mercer

In Mercer in May, the total precipitation amount is 149 mm (5.9 in) over the course of 16 days.

May Precipitation Trends in Mercer

The chart displays monthly precipitation patterns in Mercer, 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 Mercer, May typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec101110115144149140146105113127109106
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Mercer

In Mercer in May, humidity is 81%. With an average temperature of 16°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you as you travel, making you acutely aware of the sweat on your skin and creating an atmosphere that might dampen your spirits but also invites you to seek out refreshing beverages and shady spots.

May Average Humidity in Mercer

This chart illustrates the average monthly humidity levels in Mercer, 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 Mercer is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mercer

In Mercer 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 Mercer.

Maximum UV Index Levels in Mercer for May

The chart shows the monthly maximum UV Index (UVI) for Mercer 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 Mercer typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Mercer 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 Mercer Compares to Other Months

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

This table compares monthly weather conditions in Mercer, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)101 mm (4.0 inches)88%moderate
February Weather0°C (32°F)110 mm (4.3 inches)88%moderate
March Weather4°C (39°F)115 mm (4.5 inches)87%high
April Weather9°C (49°F)144 mm (5.7 inches)87%very high
May Weather16°C (60°F)149 mm (5.9 inches)81%very high
June Weather20°C (68°F)140 mm (5.5 inches)83%very high
July Weather23°C (73°F)146 mm (5.8 inches)82%very high
August Weather21°C (71°F)105 mm (4.1 inches)76%very high
September Weather19°C (66°F)113 mm (4.4 inches)77%very high
October Weather13°C (55°F)127 mm (5.0 inches)82%high
November Weather4°C (40°F)109 mm (4.3 inches)89%moderate
December Weather1°C (34°F)106 mm (4.2 inches)86%low

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