Maranhão Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Maranhão, Brazil in September.

🔎
São Luís Carolina Santo Amaro Barreirinhas

Planning a journey to Maranhão, Brazil this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What to Expect in Maranhão in September

Maranhão, Brazil is a region in Brazil. September in Maranhão generally has temperatures that range from very warm to very hot, with low precipitation.

Temperatures

The average maximum daytime temperatures vary from very warm in São Luís at 31°C (88°F) to very hot in Carolina at 37°C (99°F). Nighttime temperatures generally drop to 23°C (73°F) in Carolina and 26°C (79°F) in São Luís. These night and day temperatures are average and some days may be even warmer. So be prepared and dress for the heat.

To learn more about the conditions in specific areas of Maranhão, Brazil, check out the map below.

Precipitation

In September, precipitation varies across different areas. From low rainfall in Barreirinhas with an average of 6.5 mm (0.3 in) to low rainfall in Carolina with 22 mm (0.9 in). Looking at the climate data spanning the last 30 years, this month usually has the lowest rainfall in São Luís, marking it as the year's driest month.

Average sunshine

Several destinations enjoy plenty of sunshine this month. São Luís sees close to 250 hours of sunlight, making it great for sun lovers.

Explore Maranhão by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Maranhão in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Maranhão.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Maranhão

What is the weather like in September for some of the most popular destinations in Maranhão, Brazil?

Temperature range in Maranhão (September)

Precipitation variation in Maranhão (September)

São Luís

In September São Luís generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and low monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
31°C (88°F)
31°C (88°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
260 hours
250 hours
252 hours
Monthly rainfall
34 mm (1.3 in)
18 mm (0.7 in)
21 mm (0.8 in)
Monthly rainy days
9 days
6 days
4 days
Weather conditions
pleasant
perfect
perfect
Climate in São Luís →

Carolina

In September Carolina generally has extremely high temperatures with maximum daytime temperatures around 37°C (99°F), minimum nighttime temperatures around 23°C (73°F) and low monthly rainfall. So on average the conditions are unpleasant that month.

« August
September
October »
August
September
October
Max temperature
37°C (99°F)
37°C (99°F)
35°C (95°F)
Min temperature
22°C (72°F)
23°C (73°F)
24°C (75°F)
Monthly sun hours
265 hours
202 hours
156 hours
Monthly rainfall
2.4 mm (0.1 in)
22 mm (0.9 in)
81 mm (3.2 in)
Monthly rainy days
10 days
11 days
11 days
Weather conditions
unpleasant
unpleasant
unpleasant
Climate in Carolina →

Santo Amaro

In September Santo Amaro generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 25°C (77°F) and low monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
32°C (90°F)
32°C (90°F)
32°C (90°F)
Min temperature
25°C (77°F)
25°C (77°F)
26°C (79°F)
Monthly rainfall
16 mm (0.6 in)
10 mm (0.4 in)
15 mm (0.6 in)
Monthly rainy days
9 days
7 days
5 days
Weather conditions
perfect
perfect
perfect
Climate in Santo Amaro →

Barreirinhas

In September Barreirinhas generally has very high temperatures with maximum daytime temperatures around 34°C (93°F), minimum nighttime temperatures around 25°C (77°F) and low monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
34°C (93°F)
34°C (93°F)
34°C (93°F)
Min temperature
25°C (77°F)
25°C (77°F)
25°C (77°F)
Monthly rainfall
11 mm (0.4 in)
6.5 mm (0.3 in)
9.8 mm (0.4 in)
Monthly rainy days
9 days
8 days
5 days
Weather conditions
pleasant
pleasant
pleasant
Climate in Barreirinhas →

Atins

In September Atins generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and low monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
31°C (88°F)
31°C (88°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly rainfall
13 mm (0.5 in)
8 mm (0.3 in)
11 mm (0.4 in)
Monthly rainy days
9 days
8 days
5 days
Weather conditions
perfect
perfect
perfect
Climate in Atins →

Is your destination not in the list? Have a look at all destinations in Maranhão, in Brazil.

Popular cities in September

Day & night temperatures, rainfall and average weather in Maranhão in September.

City Weather Day temp Night temp Rainfall
São Luís 31°C (88°F) 26°C (79°F) 18 mm (0.7 in)
Carolina 37°C (99°F) 23°C (73°F) 22 mm (0.9 in)
Santo Amaro 32°C (90°F) 25°C (77°F) 10 mm (0.4 in)
Barreirinhas 34°C (93°F) 25°C (77°F) 6.5 mm (0.3 in)
Atins 31°C (88°F) 26°C (79°F) 8 mm (0.3 in)
Imperatriz 36°C (97°F) 23°C (73°F) 13 mm (0.5 in)

Maranhão weather in September: frequently asked questions

What is the weather like in Maranhão, Brazil in September?

In September, Maranhão, Brazil generally has pleasant weather conditions. São Luís sees daytime temperatures near 31°C (88°F), with nights cooling to roughly 26°C (79°F).

What is the average temperature in Maranhão, Brazil in September?

In São Luís, the average daytime high in September is 31°C (88°F), while nighttime temperatures drop to around 26°C (79°F).

Does Maranhão, Brazil get a lot of rain in September?

Rain is generally moderate to light in Maranhão, Brazil during September, with São Luís averaging close to 18 mm (0.7 in).

Is September a Good Time to Visit Maranhão, Brazil?

We consider September to be one of the best times to travel to Maranhão, Brazil. Typically, the climate in São Luís is perfect.

Generally speaking, the best visiting conditions can be found in September and October offering mostly pleasant weather in São Luís. On the other hand, the weather in January, February, March, April and May tend to be poor.

Interested in more climate information?

We have much more information about the climate in Maranhão.

Weather and climate has detailed information for every country in the world. Are you going to Brazil? Get detailed historical weather averages for many cities in Brazil.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.

The 10 most alternative cities in South America

Discover South America's top 10 alternative cities! From Valparaíso's vibrant streets to La Paz's high-altitude charm and Medellín's innovative spirit.
The 5 most tranquil retreats in the Amazon Rainforest, Brazil

Discover top sustainable lodges in the Amazon. Enjoy unique wildlife, eco-friendly stays, and immersive experiences at Anavilhanas, Cristalino, and more.
An alternative way to discover Rio de Janeiro

Don't feel like seeing the traditional tourist sights in Rio de Janeiro? We have made an overview of the sights in Rio de Janeiro that you must see if you want to visit Rio in an alternative way.
Iguazu Falls

Iguazu Falls are among the largest waterfalls on earth. You will be speechless when you see this miracle of mother nature. They are included in the World Heritage List and have also been named one of the seven wonders of the world.
Must visit in Brazil →