July Weather in Dayton, United States

Last updated: June 24, 2025

In July, the average temperature in Dayton, United States is a pleasant 23°C (73°F). However, be prepared for fluctuations, as temperatures can dip to 10°C (50°F) or soar up to a sizzling 36°C (97°F). Along with these warm days, expect 137 mm (5.4 in) of precipitation over about 17 days, resulting in an average humidity of 74%.

July Temperature in Dayton

In July in Dayton, the average temperature is 23°C (73°F). Maximums can reach 36°C (97°F), while minimums can drop to as low as 10°C (50°F). This diverse temperature range makes it an ideal time for travelers to enjoy both warm days and cooler 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 23°C (73°F), with highs reaching up to 36°C (97°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.

July Precipitation in Dayton

In Dayton in July, the total precipitation amount is 137 mm (5.4 in), occurring over a span of 17 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 137 mm (5.4 inches) of precipitation spread over approximately 17 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 74%. With an average temperature of 23°C (73°F), this humidity feels like walking through a warm, enveloping fog, making outdoor activities more strenuous and requiring frequent breaks for hydration.

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 74%, 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	-2°C (29°F)	100 mm (3.9 inches)	89%	moderate
February Weather	0°C (32°F)	123 mm (4.8 inches)	90%	moderate
March Weather	4°C (39°F)	106 mm (4.2 inches)	89%	high
April Weather	9°C (49°F)	135 mm (5.3 inches)	88%	very high
May Weather	15°C (60°F)	156 mm (6.1 inches)	80%	very high
June Weather	20°C (68°F)	139 mm (5.5 inches)	79%	very high
July Weather	23°C (73°F)	137 mm (5.4 inches)	74%	very high
August Weather	22°C (71°F)	105 mm (4.1 inches)	64%	very high
September Weather	18°C (65°F)	125 mm (4.9 inches)	67%	very high
October Weather	13°C (55°F)	128 mm (5.0 inches)	81%	high
November Weather	4°C (40°F)	100 mm (3.9 inches)	89%	moderate
December Weather	1°C (34°F)	106 mm (4.2 inches)	88%	low