May Weather in Marion, United States

Last updated: June 24, 2025

In May, the average temperature in Marion, United States is a pleasant 25°C (78°F). However, temperatures can vary, with a minimum dip to 11°C (51°F) and soaring up to a maximum of 37°C (98°F). Be prepared for some rain as well, with an average precipitation of 126 mm (5.0 in) spread over 14 days. With an average humidity of 81%, it’s a month that feels warm and a bit sticky, inviting you to embrace the local culture!

May Temperature in Marion

In May in Marion, the average temperature is 25°C (78°F). Maximums can reach 37°C (98°F) and minimums can be as low as 11°C (51°F). It's a great time to enjoy a mix of warm afternoons and cooler evenings while exploring the area.

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

The chart illustrates May temperature patterns in Marion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marion, May typically has an average temperature of 25°C (78°F), with highs reaching up to 37°C (98°F) and lows dropping to around 11°C (51°F).

Data source: Temperature data for Marion generated using information from the Copernicus Climate Change Service.

May Precipitation in Marion

In Marion in May, the precipitation amount is 126 mm (5.0 in) over a span of 14 days.

May Precipitation Trends in Marion

The chart displays monthly precipitation patterns in Marion, 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 Marion, May typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Marion

In Marion in May humidity is 81%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities less comfortable and requiring frequent breaks to stay hydrated.

May Average Humidity in Marion

This chart illustrates the average monthly humidity levels in Marion, 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 Marion is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Marion

In Marion 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 Marion.

Maximum UV Index Levels in Marion for May

The chart shows the monthly maximum UV Index (UVI) for Marion 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 Marion typically reaches 11, which falls under the extreme exposure category.

Data source: Marion 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 Marion Compares to Other Months

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

This table compares monthly weather conditions in Marion, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	44 mm (1.7 inches)	79%	moderate
February Weather	13°C (55°F)	56 mm (2.2 inches)	79%	very high
March Weather	18°C (65°F)	58 mm (2.3 inches)	74%	very high
April Weather	21°C (70°F)	75 mm (3.0 inches)	76%	extreme
May Weather	25°C (78°F)	126 mm (5.0 inches)	81%	extreme
June Weather	28°C (83°F)	84 mm (3.3 inches)	76%	extreme
July Weather	29°C (85°F)	73 mm (2.9 inches)	66%	extreme
August Weather	30°C (86°F)	69 mm (2.7 inches)	58%	extreme
September Weather	27°C (81°F)	119 mm (4.7 inches)	65%	extreme
October Weather	22°C (72°F)	88 mm (3.4 inches)	74%	very high
November Weather	16°C (61°F)	49 mm (1.9 inches)	81%	high
December Weather	13°C (56°F)	57 mm (2.3 inches)	86%	moderate