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 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
Gretna witnesses its peak temperatures during July and August, when the average high-temperature reaches 89.4°F (31.9°C).Heat index
August's heat index is computed to be an extremely hot 105.8°F (41°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.Know that the heat index computations account for shaded terrains and slight winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.
Humidity
In August, the average relative humidity is 73%.Rainfall
In Gretna, during August, the rain falls for 17.2 days and regularly aggregates up to 1.46" (37mm) of precipitation. In Gretna, during the entire year, the rain falls for 112.1 days and collects up to 9.37" (238mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
The average length of the day in August is 13h and 11min.On the first day of August, sunrise is at 6:19 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:23 pm CDT.
Sunshine
In August, the average sunshine is 10.6h.UV index
May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 7 during August translates into the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. 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. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months?
How hot does it get in Gretna in August?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
How many hours of daylight does Gretna have in August?
When are sunrise and sunset in August?
How many hours of sunshine does Gretna have in August?
What is the month with the highest UV index?
What is the UV index reading in August?
Average temperature in August
Gretna, LA
- Average high temperature in August: 89.4°F
The warmest months (with the highest average high temperature) are July and August (89.4°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in August: 79.5°F
The month with the highest average low temperature is August (79.5°F).
The coldest month (with the lowest average low temperature) is January (48.6°F).
Average pressure in August
Gretna, LA
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).
Average wind speed in August
Gretna, LA
- Average wind speed in August: 6.7mph
The windiest months (with the highest average wind speed) are February and April (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in August
Gretna, LA
- Average humidity in August: 73%
The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Gretna, LA
- Average rainfall in August: 1.46"
The wettest month (with the highest rainfall) is July (1.57").
The driest months (with the least rainfall) are March and April (0.43").
Average rainfall days in August
Gretna, LA
- Average rainfall days in August: 17.2 days
The month with the highest number of rainy days is August (17.2 days).
The month with the least rainy days is November (4.7 days).
Average snowfall days in August
Gretna, LA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in August /
Average sunshine in August
Gretna, LA
- Average daylight in August: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in August: 10h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in August
Gretna, LA
- Average sunshine days in August: 8.9 days
The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is August (8.9 days).
Average UV index in August
Gretna, LA
- Average UV index in August: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in August
Gretna, LA
- Average cloud cover in August: 28
The month with the most cloud cover is December (Cloud cover 44).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in August
Gretna, LA
- 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).
Gretna, Louisiana, USA
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