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Natal in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Natal in September will be like? Take a look at our weather guide for Natal, based on historical data.
Check flight prices to Natal on Avionero:
September

Weather in Natal in September 2025

Good Weather
Warm
🌧️
Rainy
🌊
Warm water
Planning a trip to Natal in September? You are in luck! The weather is generally good, with an average maximum temperature of +27°C and approximately 2 sunny days. Just be prepared for some rain, as there are usually around 19 rainy days and 21 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flights in one click on Avionero.

Average weather

☀️
+27°C
Avg. max. temperature
+22°C
Min.
+31°C
Max.
21 mm
Total precipitation
77%
Avg. humidity
4 m/s
Avg. wind
2 ☀️
Sunny Days
9 ⛅️
Cloudy
19 🌦
Rainy
Our opinion: Natal has good weather in September.

Average temperature in Natal in September

Here are the expected maximum, average and minimum temperatures in Natal for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +28°C during the day to a minimum of +23°C during the night, the temperature in September averages around +28°C.

The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +28°C to +28°C.

Is Natal warm or cold in September?

Natal is typically warm in September.

Maximum temperatures go up compared to the previous month from +27°C to +27°C. The minimum temperature also goes up from +23°C to +24°C.

It’s generally warm, but pack a long-sleeve shirt for evenings.

Take a look at how September is compared to other months in Natal:

Water temperature in Natal in September

Water in Natal in September is Warm. It varies from +26°C to +27°C, with an average of +27°C. This is almost similar to the air temperature, which averages +27°C.

The water temperature in September is one of the coldest of the entire year:

The warmest water temperatures in Natal are reached in April, when the average sea temperature rises to +29°C. The coldest water temperatures are in September, with an average of +27°C.

Can you swim in Natal in September?

You can absolutely swim in Natal in September, the water is warm (+27°C in average), similar to heated pools. Suitable for most people, including children and the elderly.
🦭
Cold
Below +16°C
🏄‍♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
Bring your swimming suit, sunscreen and your favorite inflatable pink flamingo.

Climate in Natal in September

Natal weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+27°C+27°C+28°C
Min. temperature
+21°C+22°C+22°C
Max. temperature
+30°C+31°C+31°C
Rainfall
31 mm21 mm15 mm
Wind
4 m/s4 m/s4 m/s
Avg. water temperature
+27°C+27°C+27°C
Humidity
79%77%74%
Air pressure
1014 HPa1014 HPa1012 HPa
Sunny days
322
Cloudy days
6911
Rainy days
221918
Snowy days
000

September weather is still as good as in August. The temperature levels stay the same in the area of +27°C for average maximum temperature during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 31 mm to 21 mm. It feels drier, as humidity decreases from 79% to 77%. The average wind speed doesn’t change much during September, staying around 4 m/s. The days becoming less sunny, going from 3 sunny days in August to 2 in September.

October brings much the same weather, it remains good.

Wind

Wind speed in Natal in September based on historical data.
Last Year
Historical Data

The average wind speed is 4 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Natal is gradually increasing during September, going from 3 m/s to 5 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Natal based on historical data.
Last Year
Historical Data
Typically, there is a 70% chance of rain on an average day in September, with total rainfall of approximately 49 mm. The maximum amount of rainfall per day is around 4 mm, which is considered light rain. September is a pretty wet month with over 21 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Natal wettest month is April, where a typical day has a 83% chance of precipitation and 138 mm of rainfall per day. October, on the other hand, is the driest month with a mere 58% chance of precipitation and 15 mm of rainfall per day.

How was the weather last September in Natal?

This is the weather in Natal in September 2023:
1 September
☁️
+28°C
2 September
☁️
+28°C
3 September
🌧️
+27°C
4 September
☁️
+28°C
5 September
🌧️
+28°C
6 September
☁️
+27°C
7 September
🌧️
+27°C
8 September
🌧️
+27°C
9 September
🌧️
+26°C
10 September
🌧️
+27°C
11 September
☀️
+27°C
12 September
🌧️
+28°C
13 September
🌧️
+27°C
14 September
☁️
+27°C
15 September
☁️
+28°C
16 September
☀️
+28°C
17 September
🌧️
+27°C
18 September
☁️
+27°C
19 September
🌧️
+26°C
20 September
🌧️
+28°C
21 September
🌧️
+27°C
22 September
🌧️
+28°C
23 September
🌧️
+28°C
24 September
🌧️
+28°C
25 September
☀️
+28°C
26 September
☁️
+28°C
27 September
☀️
+28°C
28 September
☁️
+28°C
29 September
☁️
+28°C
30 September
☁️
+28°C
In September 2023 Natal had 4 sunny days, 11 cloudy days, and 15 rainy days. The average maximum temperature was +28°C, with an absolute maximum of +28°C and a minimum of +26°C. The average humidity was 80%, with a maximum of 100% and a minimum of 65%. The average wind speed was 4 m/s, with a maximum of 10 m/s and a minimum of 1 m/s.
Are you planning a trip in September?

Climate Change over Years

This is how Natal climate have been changing during last 43 years period.

The climate in Natal in September has not changed much over the last 43 years.

The average temperature was the lowest in 1981 (+27°C) and the highest in 2019 (+30°C). The driest year was 1993 with only 299 mm of rainfall, and the wettest year was 1985 with 1504 mm.

FAQ

Frequently asked questions about the weather in Natal in September:

Is September a good time to visit Natal?

September is a really good time to go to Natal. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Natal.

Can you sunbathe in Natal in September?

September is warm in Natal. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Can you swim in Natal in September?

Yes, you can swim in Natal in September, the water temperature averaging at +27°C. This temperature is considered warm and comfortable for most swimmers.

Is Natal rainy in September?

Natal is usually dry in September. Plan your packing around outdoor activities and exploring.

Is it sunny in Natal in September?

Usually, it’s not very sunny in Natal in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in Brazil

Check out the weather for other cities in Brazil.

Monthly weather in Natal

Source of the data

For this page, we’ve looked at the typical weather in Natal, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.