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
The initiation of August sees an average high-temperature of a still tropical 86.7°F (30.4°C), showing minor variations from the previous month. Gretna's average low-temperature of 64.4°F (18°C) in August reflects a considerable decline from the daytime peak.Heat index
The average heat index in August is appraised at a sweltering 98.6°F (37°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. 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 quite important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
In August, the average relative humidity in Gretna is 72%.Rainfall
In August, the rain falls for 16.4 days. Throughout August, 2.28" (58mm) of precipitation is accumulated. Throughout the year, in Gretna, there are 158.8 rainfall days, and 30.91" (785mm) of precipitation is accumulated.Snowfall
In Gretna, snow does not fall in May through October.Daylight
In August, the average length of the day in Gretna is 13h and 32min.On the first day of the month, sunrise is at 6:23 am and sunset at 8:24 pm. On the last day of August, in Gretna, sunrise is at 6:48 am and sunset at 7:46 pm EDT.
Sunshine
In Gretna, the average sunshine in August is 10.1h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A daily high UV index of 6 in August leads to these guidelines:
Fend off overexposure. Sun protection is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Gretna in August?
What is the average humidity in August in Gretna?
How many days does it rain in August in Gretna?
When it does not snow in Gretna?
How many hours of daylight does Gretna have in August?
What time are sunrise and sunset in August in Gretna?
How long on average sun shines in August in Gretna?
What is the month with the highest UV index in Gretna?
What is the UV index reading in August in Gretna?
Average temperature in August
Gretna, VA
- Average high temperature in August: 86.7°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in August: 64.4°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in August
Gretna, VA
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in August
Gretna, VA
- Average wind speed in August: 4.3mph
The windiest months (with the highest average wind speed) are February and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in August
Gretna, VA
- Average humidity in August: 72%
The months with the highest relative humidity are May and December (76%).
The month with the lowest relative humidity is July (69%).
Average rainfall in August
Gretna, VA
- Average rainfall in August: 2.28"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in August
Gretna, VA
- Average rainfall days in August: 16.4 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in August
Gretna, VA
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Gretna, VA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Gretna, VA
- Average daylight in August: 13h and 3min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in August: 10h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in August
Gretna, VA
- Average sunshine days in August: 11.9 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in August
Gretna, VA
- 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, February and December (UV index 2).
Average cloud cover in August
Gretna, VA
- Average cloud cover in August: 34
The months with the most cloud cover are February and March (Cloud cover 44).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in August
Gretna, VA
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Gretna, Virginia, USA
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