July Weather in Dayton, United States

Last updated: June 24, 2025

In July, the average temperature in Dayton, United States is a pleasant 21°C (71°F). Expect a range between a cool 9°C (48°F) and a warm 37°C (100°F). With only 4 mm (0.2 in) of precipitation over 0 days, the weather is likely to be dry. Just keep in mind the average humidity is relatively high at 82%, adding a touch of mugginess to those sunny days!

July Temperature in Dayton

In July in Dayton, the average temperature is 21°C (71°F). The maximum can reach 37°C (100°F), while the minimum can drop as low as 9°C (48°F). This varied climate makes Dayton an ideal destination for travelers looking to enjoy both warm days and cool evenings.

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

The chart illustrates July 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, July typically has an average temperature of 21°C (71°F), with highs reaching up to 37°C (100°F) and lows dropping to around 9°C (48°F).

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

July Precipitation in Dayton

In Dayton in July, the precipitation amount is 4 mm (0.2 in) over the course of 0 days.

July Precipitation Trends in Dayton

The chart displays monthly precipitation patterns in Dayton, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Dayton, July typically receives around 4 mm (0.2 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Dayton

In Dayton in July humidity is 82%. With an average temperature of 21°C (71°F), this humidity feels like a warm, muggy embrace that can make traveling feel sticky and exhausting, urging you to seek shade and hydration as you explore the vibrant surroundings.

July Average Humidity in Dayton

This chart illustrates the average monthly humidity levels in Dayton, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Dayton is approximately 82%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Dayton

In Dayton in July, 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 Dayton.

Maximum UV Index Levels in Dayton for July

The chart shows the monthly maximum UV Index (UVI) for Dayton in July, 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 July, the maximum UV index in Dayton typically reaches 10, which falls under the very high exposure category.

Data source: Dayton July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	158 mm (6.2 inches)	85%	low
February Weather	5°C (42°F)	163 mm (6.4 inches)	84%	moderate
March Weather	8°C (47°F)	121 mm (4.8 inches)	85%	moderate
April Weather	11°C (52°F)	105 mm (4.1 inches)	83%	high
May Weather	15°C (58°F)	48 mm (1.9 inches)	83%	very high
June Weather	18°C (65°F)	39 mm (1.5 inches)	83%	very high
July Weather	21°C (71°F)	4 mm (0.2 inches)	82%	very high
August Weather	22°C (71°F)	4 mm (0.2 inches)	74%	very high
September Weather	18°C (65°F)	57 mm (2.3 inches)	71%	high
October Weather	12°C (54°F)	91 mm (3.6 inches)	81%	moderate
November Weather	8°C (47°F)	144 mm (5.7 inches)	87%	moderate
December Weather	5°C (42°F)	182 mm (7.2 inches)	87%	low