May Weather in Dayton, United States

Last updated: June 24, 2025

The average temperature in Dayton, United States during May is a pleasant 25°C (77°F). Visitors can expect a minimum temperature of 10°C (50°F) and an occasional maximum of 34°C (93°F). With a notable precipitation amount of 188 mm (7.4 in) spread over 15 days, it's wise to be prepared for some rain. Additionally, the average humidity hovers around 79%, making for a warm and somewhat steamy atmosphere.

May Temperature in Dayton

In May in Dayton, the average temperature is 25°C (77°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 10°C (50°F). This pleasant climate makes Dayton an ideal destination for travelers looking to enjoy both warm and cool experiences.

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 25°C (77°F), with highs reaching up to 34°C (93°F) and lows dropping to around 10°C (50°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 188 mm (7.4 in) over the course of 15 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 188 mm (7.4 inches) of precipitation spread over approximately 15 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 79%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly sluggish but pleasantly tropical.

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 79%, 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	12°C (54°F)	93 mm (3.7 inches)	78%	moderate
February Weather	14°C (58°F)	102 mm (4.0 inches)	81%	very high
March Weather	18°C (65°F)	100 mm (3.9 inches)	76%	very high
April Weather	21°C (69°F)	106 mm (4.2 inches)	79%	extreme
May Weather	25°C (77°F)	188 mm (7.4 inches)	79%	extreme
June Weather	27°C (81°F)	171 mm (6.7 inches)	74%	extreme
July Weather	28°C (83°F)	142 mm (5.6 inches)	71%	extreme
August Weather	28°C (83°F)	208 mm (8.2 inches)	68%	extreme
September Weather	26°C (80°F)	217 mm (8.5 inches)	73%	very high
October Weather	22°C (72°F)	116 mm (4.6 inches)	75%	very high
November Weather	16°C (62°F)	79 mm (3.1 inches)	78%	high
December Weather	14°C (58°F)	117 mm (4.6 inches)	84%	moderate