September in New Orleans is still hot and humid, although temperatures gradually become more comfortable as the month progresses. September is also the peak of Atlantic hurricane season, so visitors should be prepared for the possibility of heavy rain and tropical weather.
As a retired meteorologist and New Orleans tour guide, I'll help you understand what to expect from the weather in New Orleans in September, including temperatures, humidity, rainfall, hurricanes, and what to pack.
New Orleans Weather in September at a Glance
- Average high: 88.1°F (31.2°C)
- Average low: 73.5°F (23.1°C)
- Average daily temperature: 80.8°F (27.1°C)
- Average precipitation: 5.11 inches
- Hurricane season: June 1 through November 30
- Peak Atlantic hurricane activity: Around September 10
- What to expect: Hot, humid weather with a gradual decrease in temperatures as the month progresses
These temperature and precipitation averages are based on the National Weather Service's 1991-2020 climate normals for New Orleans International Airport.
September is cooler than July and August on average, but it is still very much summer weather in New Orleans, especially during the first half of the month.
Let's take a look!
- Average Temperatures
- Chances for Rain or Hurricane
- What to Wear
- Things to Do in September
- Seasonal Weather Outlook
- Weather Averages by Month
- Weather in August
- Weather in October
How Hot Is New Orleans in September?
September starts out hot, with daytime temperatures often near 90°F (32°C). Temperatures gradually decrease during the month, and by late September, afternoon highs are more likely to be in the mid-80s F (about 28-29°C).
At New Orleans International Airport, the 1991-2020 climate normal for September is an average high of 88.1°F (31.2°C) and an average low of 73.5°F (23.1°C). The average daily temperature is 80.8°F (27.1°C).
September is cooler than July and August, but it is still a warm month in New Orleans. You should be prepared for hot afternoons, particularly during the first half of the month.
The record high temperature in New Orleans during September is 101°F (38.3°C).
How Cold Does New Orleans Get in September?
Overnight temperatures are generally in the 70s F early in September and become somewhat cooler toward the end of the month.
By late September, a few mornings can feel noticeably more comfortable, particularly after a cold front moves through. However, truly cool fall weather is unusual this early in the season.
The record low temperature in New Orleans during September is 42°F (5.6°C).
Is New Orleans Humid in September?
Yes. September is still a humid month in New Orleans.
Humidity can make temperatures feel considerably warmer than the thermometer indicates, especially when you're walking around the French Quarter or other outdoor attractions.
The first part of September is generally the most uncomfortable, while humidity can become more manageable later in the month when temperatures begin to fall.
For visitors, this means that a temperature in the upper 80s can feel much hotter when you're walking outdoors for several hours.
If you're planning to spend a lot of time outside, schedule your longest walks for the morning or later in the afternoon whenever possible, and take advantage of New Orleans' many indoor attractions during the hottest part of the day.
How Much Does It Rain in New Orleans in September?
New Orleans averages about 5.11 inches of precipitation during September, based on the current 1991-2020 climate normals.
Rain can occur at any time of year in New Orleans, but September also brings the possibility of heavy rainfall from tropical systems.
A typical summer-like pattern can produce showers and thunderstorms, sometimes with little warning. A rainy period does not necessarily mean that an entire day will be a washout. A storm can move through and leave you with several hours of usable weather afterward.
Because of this, I recommend keeping some flexibility in your sightseeing plans and carrying rain protection when you're spending the day outdoors.
Is September Hurricane Season in New Orleans?
Yes. September falls within the Atlantic hurricane season, and it is the peak month for tropical cyclone activity.
The official Atlantic hurricane season runs from June 1 through November 30. The climatological peak of the season occurs around September 10, with most activity occurring from mid-August through mid-October.
This does not mean that a hurricane will affect New Orleans during your trip. Most September visitors will not experience a hurricane.
However, tropical systems can affect New Orleans even when they do not make a direct hit. They can bring heavy rain, strong winds, coastal flooding, and changes to travel plans.
What Is the 2026 Hurricane Season Outlook?
NOAA's 2026 Atlantic hurricane season outlook calls for a 55% chance of a below-normal season, a 35% chance of a near-normal season, and a 10% chance of an above-normal season.
NOAA forecasts 8-14 named storms, including 3-6 hurricanes and 1-3 major hurricanes.
However, seasonal outlooks should not be interpreted as a forecast for New Orleans. NOAA specifically notes that the outlook does not predict hurricane landfalls or activity for a particular location.
If you are traveling to New Orleans during September, check the forecast and official tropical weather information as your trip approaches.
What to Wear in New Orleans in September
- A small umbrella or lightweight rain jacket
- A refillable water bottle
- A light sweater or jacket for heavily air-conditioned restaurants, museums, and other indoor attractions
If you're planning to take a walking tour, comfortable shoes are particularly important. You'll also want clothing that dries quickly if you encounter a sudden summer thunderstorm.
Things to Do in New Orleans in September
The heat and humidity don't mean you have to stay indoors. September is a great time to explore New Orleans, as long as you plan around the weather.
For a complete list of seasonal events and activities, see our guide to Things to Do in New Orleans in September.
You can also explore the city with one of our New Orleans Walking Tours.
If you'd rather explore on two wheels, take a look at our New Orleans Bike Tours.
And don't forget that New Orleans has plenty of indoor attractions, restaurants, museums, and historic sites that can provide a welcome break from the September heat.
Is September a Good Time to Visit New Orleans?
September can be a good time to visit New Orleans if you don't mind heat, humidity, and the possibility of rain.
The biggest advantage is that temperatures are generally lower than in July and August, particularly toward the end of the month.
The biggest drawback is that September is the peak of hurricane season. That doesn't mean you should avoid visiting, but it does mean you should monitor the weather before and during your trip.
If you prefer cooler and less humid weather, consider visiting later in the fall. For a month-by-month comparison, see our complete guide to New Orleans Weather.
2026 Seasonal Weather Outlook for New Orleans
NOAA's current August–September–October 2026 outlook favors above-normal temperatures across much of the South and Southeast, including the general New Orleans region. The outlook also favors below-normal precipitation across parts of the Southern Plains and Lower Mississippi Valley.
For New Orleans, this suggests that September 2026 may continue to be warmer than average, although seasonal outlooks cannot predict the actual temperature or rainfall on a particular day.
It's important to remember that seasonal outlooks describe the likelihood of conditions being above, near, or below normal over a broad area. They are not a day-by-day forecast. As your trip approaches, check the latest short-range forecast for the most useful information.
