May Weather in Dayton, United States

Last updated: June 24, 2025

In May, the average temperature in Dayton, United States hovers around 14°C (58°F). However, temperatures can vary significantly, with a minimum of -3°C (26°F) and a maximum reaching up to 33°C (92°F). Expect 26 mm (1.0 in) of precipitation spread over 6 days, accompanied by an average humidity of around 64%.

May Temperature in Dayton

In May in Dayton, the average temperature is 14°C (58°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as -3°C (26°F). This variation in temperature makes it essential for travelers to pack layers to comfortably adapt to the changing conditions.

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

The chart illustrates May temperature patterns in Dayton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dayton, May typically has an average temperature of 14°C (58°F), with highs reaching up to 33°C (92°F) and lows dropping to around -3°C (26°F).

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

May Precipitation in Dayton

In Dayton in May, the precipitation amount is 26 mm (1.0 in) over the course of 6 days.

May Precipitation Trends in Dayton

The chart displays monthly precipitation patterns in Dayton, 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 Dayton, May typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 6 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 Dayton

In Dayton in May, humidity is 64%. With an average temperature of 14°C (58°F), this humidity feels like a refreshing embrace, making travel comfortable but slightly sticky, and occasionally necessitating a light jacket when the breeze picks up.

May Average Humidity in Dayton

This chart illustrates the average monthly humidity levels in Dayton, 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 Dayton is approximately 64%, 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 Dayton

In Dayton 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 Dayton.

Maximum UV Index Levels in Dayton for May

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

Data source: Dayton 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 Dayton Compares to Other Months

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

This table compares monthly weather conditions in Dayton, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	73 mm (2.9 inches)	85%	moderate
February Weather	2°C (36°F)	70 mm (2.8 inches)	87%	high
March Weather	5°C (41°F)	52 mm (2.1 inches)	84%	very high
April Weather	10°C (50°F)	25 mm (1.0 inches)	78%	very high
May Weather	14°C (58°F)	26 mm (1.0 inches)	64%	extreme
June Weather	21°C (69°F)	6 mm (0.2 inches)	56%	extreme
July Weather	25°C (78°F)	8 mm (0.3 inches)	44%	extreme
August Weather	24°C (76°F)	9 mm (0.3 inches)	34%	extreme
September Weather	19°C (67°F)	6 mm (0.2 inches)	41%	very high
October Weather	11°C (53°F)	29 mm (1.1 inches)	60%	high
November Weather	6°C (43°F)	30 mm (1.2 inches)	81%	moderate
December Weather	1°C (34°F)	49 mm (1.9 inches)	82%	moderate