September weather forecastSanto André, Brazil
September
Weather in September
September in Santo André witnesses a perceptible shift in weather as spring starts settling in. The month portrays an increase in average temperatures, encroaching back into the more familiar warm zone. Rainfall, cloud cover and humidity increase as Spring takes hold, contrasting with the dry winter months. Winds stir a bit more, offering relief from the growing heat. Despite the increased cloud coverage, long daylight hours and higher visibility ensure bright days.Temperature
Santo André marks the start of September with an average high-temperature of a moderately hot 24.1°C (75.4°F), hinting at a slight fluctuation from August's 22.7°C (72.9°F). Throughout the month of September, Santo André reports a steady low-temperature average of 15.9°C (60.6°F).Humidity
In Santo André, the average relative humidity in September is 76%.Rainfall
In September, the rain falls for 14.6 days. Throughout September, 52mm (2.05") of precipitation is accumulated. Throughout the year, in Santo André, there are 217.7 rainfall days, and 1056mm (41.57") of precipitation is accumulated.Daylight
In Santo André, the average length of the day in September is 11h and 58min.On the first day of September in Santo André, sunrise is at 06:16 and sunset at 17:55. On the last day of the month, sunrise is at 05:46 and sunset at 18:05 -03.
Sunshine
With an average of 7.8h of sunshine, September has the most sunshine of the year in Santo André.UV index
The months with the lowest UV index in Santo André are February, April through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In September, the UV index of 5 transforms into the following advice:
Guard yourself - Avoiding sunburn is suggested. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Santo André, Brazil
- Average high temperature in September: 24.1°C
The warmest month (with the highest average high temperature) is February (27.3°C).
The month with the lowest average high temperature is July (21.4°C).
- Average low temperature in September: 15.9°C
The month with the highest average low temperature is January (20.4°C).
The coldest month (with the lowest average low temperature) is July (14.3°C).
Average pressure in September
Santo André, Brazil
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is July (1020.2mbar).
The month with the lowest atmospheric pressure is December (1011.8mbar).
Average wind speed in September
Santo André, Brazil
- Average wind speed in September: 9.6km/h
The windiest month (with the highest average wind speed) is November (10.1km/h).
The calmest month (with the lowest average wind speed) is February (8.1km/h).
Average humidity in September
Santo André, Brazil
- Average humidity in September: 76%
The months with the highest relative humidity are March and April (84%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Santo André, Brazil
- Average rainfall in September: 52mm
The wettest month (with the highest rainfall) is January (199mm).
The driest month (with the least rainfall) is August (37mm).
Average rainfall days in September
Santo André, Brazil
- Average rainfall days in September: 14.6 days
The month with the highest number of rainy days is January (26.7 days).
The month with the least rainy days is August (10.9 days).
Average daylight in September /
Average sunshine in September
Santo André, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 36min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is September (Average sunshine: 7h and 48min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).
Average sunshine days in September
Santo André, Brazil
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is August (17.2 days).
The month with the least sunshine days is February (3.1 days).
Average UV index in September
Santo André, Brazil
- Average UV index in September: 5
The months with the highest UV index are January, March, October, November and December (UV index 6).
The months with the lowest UV index are February, April, May, June, July, August and September (UV index 5).
Average cloud cover in September
Santo André, Brazil
- Average cloud cover in September: 40
The month with the most cloud cover is November (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Santo André, Brazil
- Average visibility in September: 9km
The months with the highest visibility are June, July, August and September (9km).
The months with the lowest visibility are January, February, March, April, May, October, November and December (8km).
