Gretna (LA) Weather and Climate: A Comprehensive Guide
The climate in Gretna is marked by big temperature swings throughout the year.
Temperatures range from very warm during the warmest months
to mild in the cooler months.
It is also known for its large amounts of rainfall.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
In Gretna, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a very warm 33°C in August to a moderate 17°C in the coolest month, January.
Nights are cooler, with lows often dropping to around 7°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Gretna experiences significant rainfall throughout the year, averaging 1715 mm of precipitation annually. The climate in Gretna shows significant variation throughout the year. Expect heavy rainfall in July, with an average of 217 mm of precipitation over 21 rainy days. In contrast, November offers drier and sunnier days, with around 75 mm of rainfall over 7 rainy days. For more details, please visit our Gretna Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
For those who appreciate different seasons, Gretna serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 9.3 hours of sunshine daily, and embrace the darker days in January, offering only 5.1 hours of daily sunlight. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average water temperature
The mean water temperature over the year ranges from 20°C in January to 28°C in June.
Water temperature over the year
Average humidity
The relative humidity is high throughout the year in Gretna.
The city experiences its highest humidity in July, reaching 79%. In February, the humidity drops to its lowest level at 73%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
Average wind speed
The mean wind speed varies between 3 m/s and 5 m/s throughout the year. It is lowest in June, July, August, September and October and highest during February and March.
The mean monthly wind speed over the year (meters per second)
clear and no rain clear and no rain partly cloudy and small chance of slight rainForecast for Gretna (LA)
3 m/s
4 m/s
5 m/s
The best time of year to visit Gretna in the United States of America
During the months of March and November you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Most rainfall (rainy season) is seen in April, June, July, August, September and December.
August has an average maximum temperature of 33°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 17°C.
July tops the wettest month list with 217 mm of rainfall.
November is the driest month with 75 mm of precipitation.
May is the sunniest month with an average of 279 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
