August Weather in Dayton, United States

Last updated: June 24, 2025

In Dayton, United States, the average temperature in August is a pleasant 23°C (73°F). However, don't be surprised if temperatures swing between a cool 10°C (50°F) and a scorching 37°C (100°F). Expect 95 mm (3.8 in) of precipitation spread over about 11 days, and prepare for a relatively high average humidity of 77%.

August Temperature in Dayton

In August in Dayton, the average temperature is 23°C (73°F). Maximum can reach 37°C (100°F), and the minimum can be as low as 10°C (50°F). This makes Dayton an ideal destination for travelers seeking warm weather during the day but cool evenings for relaxation.

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 23°C (73°F), with highs reaching up to 37°C (100°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec212138486174767367513729
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 95 mm (3.8 in) spread over 11 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 95 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec3243727216610989961271234137
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 77%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable but bearable. It's essential to stay hydrated and take frequent breaks to enjoy the sights while avoiding overheating.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%80%81%74%81%80%77%75%80%87%83%
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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589111098633
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 Weather-6°C (21°F)32 mm (1.3 inches)82%moderate
February Weather-6°C (21°F)42 mm (1.7 inches)84%moderate
March Weather3°C (38°F)72 mm (2.8 inches)80%moderate
April Weather9°C (48°F)72 mm (2.8 inches)81%very high
May Weather16°C (62°F)166 mm (6.5 inches)74%very high
June Weather23°C (74°F)109 mm (4.3 inches)80%extreme
July Weather24°C (76°F)89 mm (3.5 inches)80%very high
August Weather23°C (73°F)95 mm (3.8 inches)77%very high
September Weather20°C (68°F)127 mm (5.0 inches)75%very high
October Weather11°C (51°F)123 mm (4.8 inches)80%high
November Weather3°C (37°F)41 mm (1.6 inches)87%moderate
December Weather-2°C (29°F)37 mm (1.5 inches)83%moderate

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