The first month of the spring, September
, is also a moderately hot month in Salvador
, with an average temperature fluctuating between 21.7°C (71.1°F) and 27.2°C (81°F).
In Salvador, the average high-temperature in September is essentially the same as in August
- a still moderately hot 27.2°C (81°F). In September, in Salvador, the average low-temperature is 21.7°C (71.1°F).
In September, the average heat index is computed to be a hot 30°C (86°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.Note
: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
In September, the average relative humidity in Salvador is 79.6%.
The month with the least rainfall in Salvador, Brazil, is September, when the rain falls for 12 days and typically collects 102mm (4.02") of precipitation.
In Salvador, the average seawater temperature in September is 25.8°C (78.4°F).Note
: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.
The average length of the day in September is 12h and 2min.
On the first day of September, sunrise is at 05:38 and sunset at 17:29. On the last day of the month, sunrise is at 05:17 and sunset at 17:30 -03.
The average sunshine in September is 7h.
The months with the highest UV index in Salvador are January
, September through December
, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note
: The daily maximum UV index of 12 in September interpret into the following advice:
Practice all essential precautions. Protection against sun damage is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.