September weather forecastNatal, Brazil
September
Weather in September
Natal in September retains the weather pattern observed in August. Remarkably, the rainfall hits a yearly low at just 7mm (0.28") for the entire month. Humidity levels start to ease, providing more comfort and maintaining a favorable balance in the weather conditions. Sea temperatures take a turn, showing signs of a slight increase, marking the onset of warmer waters. Consequently, wind speeds escalate slightly, adding a vibrant touch to Natal's coastal charm.Temperature
September in Natal displays an average high-temperature of a still warm 27.9°C (82.2°F), holding the same as the previous month. Night temperatures during September in Natal experience a slight downturn, averaging a still warm 24°C (75.2°F).Heat index
In September, the heat index is calculated to be a tropical 31°C (87.8°F). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.Heat index readings emphasize conditions of light breezes and shaded spots. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humidity
In September, the average relative humidity is 75%.Rainfall
The months with the least rainfall in Natal are September and October Rain falls for 8 days and accumulates 7mm (0.28") of rain.Sea temperature
The month with the coldest seawater in Natal is September, with an average sea temperature of 26.7°C (80.1°F).Note: A water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.
Daylight
The average length of the day in September is 12h and 5min.On the first day of the month, sunrise is at 05:20 and sunset at 17:20. On the last day of September, in Natal, sunrise is at 05:05 and sunset at 17:15 -03.
Sunshine
In September, the average sunshine in Natal is 8.3h.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Natal, Brazil. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 7 during September, leads to the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Take note! The UV strength of the Sun elevates when reflected off water and sand.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Natal, Brazil
- Average high temperature in September: 27.9°C
The warmest month (with the highest average high temperature) is March (30.2°C).
The month with the lowest average high temperature is July (27.8°C).
- Average low temperature in September: 24°C
The month with the highest average low temperature is March (26.3°C).
The coldest months (with the lowest average low temperature) are July and August (23.8°C).
Average pressure in September
Natal, Brazil
- Average pressure in September: 1014.4mbar
The month with the highest atmospheric pressure is August (1015mbar).
The month with the lowest atmospheric pressure is February (1011.2mbar).
Average wind speed in September
Natal, Brazil
- Average wind speed in September: 26.2km/h
The windiest month (with the highest average wind speed) is September (26.2km/h).
The calmest months (with the lowest average wind speed) are March and April (17.9km/h).
Average humidity in September
Natal, Brazil
- Average humidity in September: 75%
The months with the highest relative humidity are June and July (79%).
The months with the lowest relative humidity are October and November (73%).
Average rainfall in September
Natal, Brazil
- Average rainfall in September: 7mm
The wettest month (with the highest rainfall) is March (134mm).
The driest months (with the least rainfall) are September and October (7mm).
Average rainfall days in September
Natal, Brazil
- Average rainfall days in September: 8 days
The month with the highest number of rainy days is April (23.4 days).
The month with the least rainy days is September (8 days).
Average sea temperature in September
Natal, Brazil
- Average sea temperature in September: 26.7°C
The best months for swimming (with the highest average sea temperature) are March and April (28.8°C).
The coldest month (with the lowest average sea temperature) is September (26.7°C).
Average daylight in September /
Average sunshine in September
Natal, Brazil
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 48min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is October (Average sunshine: 8h and 24min).
The month with the least sunshine is July (Average sunshine: 7h and 0min).
Average sunshine days in September
Natal, Brazil
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is August (18.8 days).
The month with the least sunshine days is February (1.3 days).
Average UV index in September
Natal, Brazil
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Natal, Brazil
- Average cloud cover in September: 39
The month with the most cloud cover is July (Cloud cover 48).
The months with the least cloud cover are October and November (Cloud cover 37).
Average visibility in September
Natal, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
