July Weather in Dayton, United States

Last updated: June 24, 2025

In Dayton, United States, the average temperature in July hovers around 23°C (74°F). However, temperatures can vary widely, ranging from a chilly 8°C (46°F) at night to a scorching 39°C (103°F) during the day. You can expect a light drizzle with a total precipitation of only 4 mm (0.1 in) spread over about 1 day. The average humidity during this month is a comfortable 77%, adding to the overall experience of this vibrant locale.

July Temperature in Dayton

In July in Dayton, the average temperature is 23°C (74°F), with maximums reaching up to 39°C (103°F) and minimums dropping as low as 8°C (46°F). Pack accordingly to enjoy the warm days and cool nights during your travels!

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 23°C (74°F), with highs reaching up to 39°C (103°F) and lows dropping to around 8°C (46°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 (0.1 in) over the course of 1 day.

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 (0.1 inches) of precipitation spread over approximately 1 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 77%. With an average temperature of 23°C (74°F), this humidity feels like being enveloped in a warm, sticky blanket, making travel somewhat uncomfortable and requiring frequent hydration breaks to enjoy the sights without feeling overheated.

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 77%, 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	1°C (35°F)	67 mm (2.7 inches)	85%	low
February Weather	1°C (34°F)	105 mm (4.1 inches)	86%	moderate
March Weather	5°C (42°F)	71 mm (2.8 inches)	86%	high
April Weather	9°C (48°F)	58 mm (2.3 inches)	82%	high
May Weather	14°C (57°F)	53 mm (2.1 inches)	77%	very high
June Weather	18°C (65°F)	30 mm (1.2 inches)	79%	very high
July Weather	23°C (74°F)	4 mm (0.1 inches)	77%	very high
August Weather	22°C (73°F)	15 mm (0.6 inches)	62%	very high
September Weather	17°C (63°F)	26 mm (1.0 inches)	60%	high
October Weather	10°C (49°F)	57 mm (2.3 inches)	80%	moderate
November Weather	5°C (41°F)	74 mm (2.9 inches)	87%	moderate
December Weather	1°C (34°F)	78 mm (3.1 inches)	86%	low