Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
São Fernando's average high-temperature in September is a still hot 34.5°C (94.1°F), indicating a subtle variation from August. Despite soaring daytime temperatures, São Fernando registers a consistent average low-temperature of 22.3°C (72.1°F) in September.Heat index
In September, the heat index is calculated to be a blisteringly hot 40°C (104°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Note that heat index values are valued for light wind and location in the shade. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
The average relative humidity in September is 52%.Rainfall
The months with the least rainfall in São Fernando, Brazil, are August and September Rain falls for 0.9 days and accumulates 1mm (0.04") of rain.Daylight
In São Fernando, the average length of the day in September is 12h and 4min.On the first day of the month, sunrise is at 05:28 and sunset at 17:28. On the last day of September, in São Fernando, sunrise is at 05:13 and sunset at 17:23 -03.
Sunshine
September has the most sunshine of the year in São Fernando, with an average of 9.8h of sunshine.UV index
The months with the highest UV index in São Fernando, Brazil, are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 7 suggests these recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
How hot does it get in São Fernando in September?
What is the average humidity in September in São Fernando?
What is the driest month in São Fernando?
How much does it rain in São Fernando in September?
What is the average length of the day in September in São Fernando?
When is the sunrise / sunset in September in São Fernando?
What month has the most sunshine in São Fernando?
How many hours of sunshine does São Fernando have in September?
When is the highest UV index in São Fernando?
When is the lowest UV index in São Fernando?
How high is the UV index in September in São Fernando?
Average temperature in September
São Fernando, Brazil
- Average high temperature in September: 34.5°C
The warmest month (with the highest average high temperature) is November (35.5°C).
The month with the lowest average high temperature is July (31.8°C).
- Average low temperature in September: 22.3°C
The month with the highest average low temperature is December (24.4°C).
The coldest months (with the lowest average low temperature) are July and August (21.3°C).
Average pressure in September
São Fernando, Brazil
- Average pressure in September: 1014.2mbar
The month with the highest atmospheric pressure is July (1015.3mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).
Average wind speed in September
São Fernando, Brazil
- Average wind speed in September: 24.2km/h
The windiest month (with the highest average wind speed) is September (24.2km/h).
The calmest month (with the lowest average wind speed) is March (13km/h).
Average humidity in September
São Fernando, Brazil
- Average humidity in September: 52%
The months with the highest relative humidity are April and May (70%).
The month with the lowest relative humidity is November (50%).
Average rainfall in September
São Fernando, Brazil
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is March (106mm).
The driest months (with the least rainfall) are August and September (1mm).
Average rainfall days in September
São Fernando, Brazil
- Average rainfall days in September: 0.9 days
The month with the highest number of rainy days is April (21.5 days).
The month with the least rainy days is September (0.9 days).
Average daylight in September /
Average sunshine in September
São Fernando, Brazil
- Average daylight in September: 12h and 1min
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: 9h and 5min
The month with the most sunshine is September (Average sunshine: 9h and 48min).
The month with the least sunshine is March (Average sunshine: 8h and 36min).
Average sunshine days in September
São Fernando, Brazil
- Average sunshine days in September: 29.2 days
The month with the most sunshine days is September (29.2 days).
The month with the least sunshine days is April (7.2 days).
Average UV index in September
São Fernando, 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
São Fernando, Brazil
- Average cloud cover in September: 13
The month with the most cloud cover is April (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 13).
Average visibility in September
São Fernando, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is April (9km).
São Fernando, Brazil
Weather forecast for your location
2. Allow the app to use your location
