Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Vienna's weather, upon August's arrival, documents an average high-temperature of a still warm 82.8°F (28.2°C), nearly identical to the prior month. In the month of August, Vienna witnesses a consistent average low-temperature of 68°F (20°C).Heat index
During August, the heat index is appraised at a tropical 91.4°F (33°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The months with the highest humidity in Vienna are May, August and September, with an average relative humidity of 80%.Rainfall
In Vienna, in August, it is raining for 12.6 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, there are 114.4 rainfall days, and 12.05" (306mm) of precipitation is accumulated.Snowfall
In Vienna, Maryland, snow does not fall in May through October.Daylight
In August, the average length of the day is 13h and 37min.On the first day of August, sunrise is at 6:05 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 7:34 pm EDT.
Sunshine
In Vienna, the average sunshine in August is 10.3h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 6 in August leads to these recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is August in Vienna?
What are the most humid months?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
How many hours of daylight does Vienna have in August?
When is the sunrise / sunset in August?
How many hours of sunshine does Vienna have in August?
When is the highest UV index?
What is the UV index reading in August?
Average temperature in August
Vienna, MD
- Average high temperature in August: 82.8°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in August: 68°F
The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in August
Vienna, MD
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in August
Vienna, MD
- Average wind speed in August: 6.1mph
The windiest month (with the highest average wind speed) is February (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in August
Vienna, MD
- Average humidity in August: 80%
The months with the highest relative humidity are May, August and September (80%).
The months with the lowest relative humidity are January, February, March and April (75%).
Average rainfall in August
Vienna, MD
- Average rainfall in August: 1.42"
The wettest month (with the highest rainfall) is July (1.46").
The driest months (with the least rainfall) are April and May (0.79").
Average rainfall days in August
Vienna, MD
- Average rainfall days in August: 12.6 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in August
Vienna, MD
- Average snowfall in August: 0"
The month with the highest snowfall is January (0.75").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Vienna, MD
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Vienna, MD
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in August: 10h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in August
Vienna, MD
- Average sunshine days in August: 15.1 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (14.7 days).
Average UV index in August
Vienna, MD
- Average UV index in August: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in August
Vienna, MD
- Average cloud cover in August: 29
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in August
Vienna, MD
- 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).
Vienna, Maryland, USA
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