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August Weather in Dayton, United States

Last updated: June 24, 2025

In August, the average temperature in Dayton, United States reaches a pleasant 25°C (77°F). However, be prepared for a range, as temperatures can dip to a minimum of 16°C (61°F) and soar to a maximum of 34°C (94°F). Expect about 137 mm (5.4 in) of precipitation over 15 days, accompanied by an average humidity level of 67%.

August Temperature in Dayton

In August in Dayton, the average temperature is 25°C (77°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 16°C (61°F). This mild climate makes it an ideal time for travelers to explore and enjoy outdoor activities in Dayton.

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

The chart illustrates August 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, August typically has an average temperature of 25°C (77°F), with highs reaching up to 34°C (94°F) and lows dropping to around 16°C (61°F).
JanFebMarAprMayJunJulAugSepOctNovDec414652596975797773634945
Data source: Temperature data for Dayton generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Dayton

In Dayton in August, the precipitation amount is 137 mm (5.4 in) over the course of 15 days.

August Precipitation Trends in Dayton

The chart displays monthly precipitation patterns in Dayton, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Dayton, August typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec10317317416613311913713710512974140
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Dayton

In Dayton in August, humidity is 67%. With an average temperature of 25°C (77°F), this humidity feels like traveling through a warm, heavy blanket, making outdoor activities feel more strenuous and sticky than usual.

August Average Humidity in Dayton

This chart illustrates the average monthly humidity levels in Dayton, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Dayton is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Dayton

In Dayton in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Dayton in August, 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 August, the maximum UV index in Dayton typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Dayton August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)103 mm (4.0 inches)87%moderate
February Weather8°C (47°F)173 mm (6.8 inches)87%high
March Weather11°C (53°F)173 mm (6.8 inches)85%very high
April Weather15°C (59°F)166 mm (6.5 inches)82%very high
May Weather21°C (69°F)133 mm (5.2 inches)83%extreme
June Weather24°C (75°F)119 mm (4.7 inches)82%extreme
July Weather26°C (79°F)137 mm (5.4 inches)78%extreme
August Weather25°C (77°F)137 mm (5.4 inches)67%very high
September Weather23°C (74°F)105 mm (4.1 inches)64%very high
October Weather17°C (64°F)129 mm (5.1 inches)74%high
November Weather9°C (49°F)74 mm (2.9 inches)87%moderate
December Weather7°C (45°F)140 mm (5.5 inches)88%moderate

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