New Orleans Weather in September

With daytime temperatures of 31°C (88°F) and nighttime lows of 23°C (73°F), September in New Orleans brings very high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 155 mm (6.1 in) falls on average.

Rainfall in New Orleans in September

Historically, September sees about 13 days of rain, with a monthly average of 155 mm (6.1 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in New Orleans in September

In September, New Orleans sees very high temperatures, with highs of 31°C (88°F). Nights drop to around 23°C (73°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With overnight lows of 23°C (73°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.

Sunshine in New Orleans in September

There are approximately 227 hours of sunshine this month, resulting in mostly clear days.

Wind Speed in New Orleans in September

Average wind speeds reach 3 m/s (6 knots) in September, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in September

At 28°C (82°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

Should you favor a climate that's both dry and comfortably warm, October and November typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit the United States of America, check out our New Orleans's climate page.

New Orleans Temperature in September

Min Temperature 23°C (73°F)  

Max Temperature 31°C (88°F)  

Water Temperature 28°C (82°F)  

Chance of Rain 44%  

Precipitation 155 mm (6.1 in)  

Rainy days 13 days  

Humidity 78%  

Windspeed 3 m/s (6 knots)  

Sunshine 227 hours  

Percentage Sunshine 62%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in New Orleans typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows typically ranging from 20°C (68°F) to 24°C (75°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for New Orleans in September

Browse day-by-day weather records for New Orleans spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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New Orleans historical weather extremes in September

The extremes listed below come from historical weather data collected in New Orleans from 1976 through 2025.

• On September 10, 1980, temperatures climbed to 38°C (100°F), marking the warmest September day on record.
• The coldest September day was on September 26, 2000, with a maximum of 18°C (64°F).
• The lowest overnight temperature recorded in September was 12°C (54°F) (September 20, 1981).

What to Wear in New Orleans in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in New Orleans in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

8/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our New Orleans's climate page.

More climate data for New Orleans

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full New Orleans climate overview or explore weather in the United States of America.