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Gretna (LA) Climate by Month

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 day and night temperature

In Gretna, temperatures differ significantly between summer and winter months. Typically, 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 temperatures generally dropping to 7°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

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.

The mean monthly precipitation over the year, including rain, hail and snow

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.

Monthly hours of sunshine

Data from: New Orleans, the United States of America (20 KM, 12 Miles).

Daily hours of sunshine

Data from: New Orleans, the United States of America (20 KM, 12 Miles).

Average water temperature

The mean water temperature over the year in Gretna ranges from 20°C in January to 28°C in June.

Water temperature over the year

Data from: New Orleans, the United States of America (20 KM, 12 Miles).

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:
  • Which months have the greatest rainfall in Gretna?
    Most rainfall (rainy season) is seen in April, June, July, August, September and December.
  • Which is the warmest month in Gretna?
    August has an average maximum temperature of 33°C and is the warmest month of the year.
  • Which is the coldest month in Gretna?
    The coldest month is January with an average maximum temperature of 17°C.
  • Which is the wettest month in Gretna?
    July tops the wettest month list with 217 mm of rainfall.
  • Which is the driest month in Gretna?
    November is the driest month with 75 mm of precipitation.
  • Which is the sunniest month in Gretna?
    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.

    Forecast for Gretna (LA)

    Thu   Nov 21
    19°C | 11°C
    N 22 km/h
    clear and no rain

    clear and no rain

    Fri   Nov 22
    17°C | 9°C
    N 14 km/h
    clear and no rain

    clear and no rain

    Sat   Nov 23
    19°C | 8°C
    NE 7 km/h
    clear and no rain

    clear and no rain