August weather forecast
Dayton, OH

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The Maimi and Mad rivers converge to flow through Dayton city, Ohio
The Maimi and Mad rivers converge to flow through Dayton city, Ohio

Weather in August

August in Dayton is a period of transition from peak summer towards the cooler months. While still hot, the temperature gradually decreases, bringing some relief to the city's residents. The humidity level remains relatively high although sunshine hours start to diminish. This progression heralds the arrival of autumn in the forthcoming months. The recorded maximum temperature for this month is 80.2°F (26.8°C).

Temperature

On the advent of August, Dayton's average high-temperature exhibits a minor adjustment to a still warm 80.2°F (26.8°C) from July's 81.3°F (27.4°C). Throughout the month of August, the nighttime temperature dips to an average of 62.4°F (16.9°C).

Humidity

In Dayton, Ohio, the average relative humidity in August is 79%.

Rainfall

In Dayton, in August, during 14.2 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. In Dayton, Ohio, during the entire year, the rain falls for 149.5 days and collects up to 23.9" (607mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in August in Dayton is 13h and 41min.
On the first day of the month, sunrise is at 6:36 am and sunset at 8:49 pm. On the last day of August, in Dayton, sunrise is at 7:04 am and sunset at 8:09 pm EDT.

Sunshine

In August, the average sunshine is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in August interprets into the following advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.

Frequently asked questions

What are August temperatures in Dayton?

In Dayton, 80.2°F (26.8°C) is the average high-temperature and 62.4°F (16.9°C) is the average low-temperature during August. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in July is computed to be 87.8°F (31°C).

What is the average humidity in August in Dayton?

In August, the average relative humidity in Dayton, Ohio, is 79%.

How many days does it rain in August in Dayton?

In Dayton, Ohio, in August, it is raining for 14.2 days, with typically 1.93" (49mm) of accumulated precipitation.

When it does not snow in Dayton?

In Dayton, snow does not fall in May through September.

What is the average length of the day in August in Dayton?

In Dayton, Ohio, the average day length in August is 13h and 41min.

What time are sunrise and sunset in August in Dayton?

In August, on the first day of the month, sunrise is at 6:36 am and sunset at 8:49 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 8:09 pm EDT.

How many hours of sunshine does Dayton have in August?

In August, the average sunshine duration in Dayton is 10.1h.

What is the month with the highest UV index in Dayton?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Dayton, Ohio.

What is the UV index reading in August in Dayton?

In August, the average daily maximum UV index in Dayton is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Dayton, OH

Average temperature in August - Dayton, OH
  • Average high temperature in August: 80.2°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in August: 62.4°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

Average pressure in August
Dayton, OH

Average pressure in August - Dayton, OH
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
Dayton, OH

Average wind speed in August - Dayton, OH
  • Average wind speed in August: 5.7mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

Average humidity in August
Dayton, OH

Average humidity in August - Dayton, OH
  • Average humidity in August: 79%

The months with the highest relative humidity are January, February and December (82%).
The month with the lowest relative humidity is October (74%).

Average rainfall in August
Dayton, OH

Average rainfall in August - Dayton, OH
  • Average rainfall in August: 1.93"

The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are September and November (1.5").

Average rainfall days in August
Dayton, OH

Average rainfall days in August - Dayton, OH
  • Average rainfall days in August: 14.2 days

The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (7.5 days).

Average snowfall in August
Dayton, OH

Average snowfall in August - Dayton, OH
  • Average snowfall in August: 0"

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Dayton, OH

Average snowfall days in August - Dayton, OH
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Dayton, OH

Average daylight in August / Average sunshine in August - Dayton, OH
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in August: 10h and 1min

The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in August
Dayton, OH

Average sunshine days in August - Dayton, OH
  • Average sunshine days in August: 13.8 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (9.8 days).

Average UV index in August
Dayton, OH

Average UV index in August - Dayton, OH
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in August
Dayton, OH

Average cloud cover in August - Dayton, OH
  • Average cloud cover in August: 29

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in August
Dayton, OH

Average visibility in August - Dayton, OH
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Dayton, Ohio, USA

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