Gretna, Louisiana Weather
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Climate of Gretna: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), August is usually the hottest month in Gretna, with average daytime highs around 31°C. January is the coolest, when nights typically fall to about 8°C.
The area receives about 1530 mm of rain in a typical year. Most of it falls from February to October and December (around 89% of the yearly total), and August is the wettest month at roughly 190 mm.
For outdoor plans and travel, November usually offers the most comfortable weather in Gretna, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 16° | 8° | 98 mm | 81% |
| Feb | 18° | 10° | 107 mm | 82% |
| Mar | 21° | 14° | 104 mm | 80% |
| Apr | 24° | 18° | 128 mm | 79% |
| May | 28° | 22° | 119 mm | 76% |
| Jun | 30° | 26° | 176 mm | 76% |
| Jul | 31° | 26° | 173 mm | 77% |
| Aug | 31° | 26° | 190 mm | 78% |
| Sep | 29° | 24° | 129 mm | 78% |
| Oct | 26° | 19° | 104 mm | 78% |
| Nov | 21° | 14° | 77 mm | 79% |
| Dec | 17° | 10° | 128 mm | 82% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Gretna. Values describe typical conditions, not a forecast.
About Gretna weather
Gretna is set in Louisiana's humid subtropical, Gulf Coast climate with real hurricane exposure (June–November), about 4 km south-east of New Orleans. Summers bring hot, very humid summers (June–September) with highs often above 33°C. The year winds down with mild, short winters (December–February). This page shows live, auto-refreshing weather for Gretna: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Gretna is about 4 km south-east of New Orleans, in Louisiana.
Gretna sees mild, short winters (December–February).
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Gretna's exact coordinates. No fixed schedule, the page updates whenever you load it.
August is usually the hottest month in Gretna, with average daytime highs of about 31°C and nights around 26°C.
The coldest nights come in January, when the average low is about 8°C and daytime highs reach around 16°C.
Gretna receives about 1530 mm of rain in a typical year. August is the wettest month at roughly 190 mm, and the main rainy period is February to October and December.
November usually offers the most comfortable weather in Gretna, with mild daytime temperatures and little rain.
In November Gretna typically sees daytime highs near 21°C and lows near 14°C, with about 77 mm of rain over the month and average humidity around 79%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Gretna is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Gretna's day-to-day weather follows the broader pattern of Louisiana described above. See the hourly weather forecast or the air quality index for more detail.