Boa Vista
Brazil
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Boa Vista, Brazil

September, the first month of the autumn, in Boa Vista, is still a hot month, with average temperature ranging between max 33°C (91.4°F) and min 23°C (73.4°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still tropical 33°C (91.4°F). In Boa Vista, in September, the average low-temperature is 23°C (73.4°F).

Rainfall

In Boa Vista, it is raining for 14 days, with typically 93mm (3.7") of accumulated precipitation. Throughout the year, in Boa Vista, there are 184 rainfall days, and 1639mm (64.5") of precipitation is accumulated.

Daylight

In Boa Vista, the average length of the day in September is 12.1h.

Sunshine

January through April, September through November, with an average of 8h of sunshine, are months with the most sunshine in Boa Vista.

UV index

Months with the highest UV index are January through May, July through December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.

What is the temperature in September in Boa Vista?

In Boa Vista, in September, the average high-temperature is 33°C (91.4°F), and the average low-temperature is 23°C (73.4°F).

How much does it rain in Boa Vista in September?

In September, in Boa Vista, the rain falls for 14 days. Throughout September, 93mm (3.7") of precipitation is accumulated.

How many hours of daylight does Boa Vista have in September?

The average length of the day in September in Boa Vista is 12.1h.

What are the months with the most sunshine in Boa Vista?

Months with the most sunshine in Boa Vista, Brazil, are January through April, September through November, with an average of 8h of sunshine.

How many hours of sunshine does Boa Vista have in September?

The average sunshine in September in Boa Vista, Brazil, is 8h.

What are the months with the highest UV index in Boa Vista?

Months with the highest UV index in Boa Vista are January through May, July through December, with an average maximum UV index of 12.

What is the UV index intensity in September in Boa Vista?

The average daily maximum UV index in September is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from unsafe exposure to the Sun's UV rays.
Average temperature in September - Boa Vista, Brazil
  • Average high temperature in September: 33°C

The warmest month (with the highest average high temperature) is October (34°C).
Months with the lowest average high temperature are June and July (30°C).

  • Average low temperature in September: 23°C

Months with the highest average low temperature are January, February, March, April, May, September, October, November and December (23°C).
Coldest months (with the lowest average low temperature) are June, July and August (22°C).

Average rainfall in September - Boa Vista, Brazil
  • Average rainfall in September: 93mm

The wettest month (with the highest rainfall) is June (347mm).
The driest month (with the lowest rainfall) is February (27mm).

Average rainfall days in September - Boa Vista, Brazil
  • Average rainfall days in September: 14 days

The month with the highest number of rainy days is June (28 days).
The month with the lowest number of rainy days is February (7 days).

Average daylight in September / Average sunshine in September - Boa Vista, Brazil
  • Average daylight in September: 12.1h

Months with the longest days are May, June and July (Average daylight: 12.3h).
Months with shortest days are January, February, November and December (Average daylight: 12h).

  • Average sunshine in September: 8h

Months with most sunshine are January, February, March, April, September, October and November (Average sunshine: 8h).
Months with least sunshine are May, June, July, August and December (Average sunshine: 7).

Average UV index in September - Boa Vista, Brazil
  • Average UV index in September: 12

Months with the highest UV index are January, February, March, April, May, July, August, September, October, November and December (UV index 12).
The month with the lowest UV index is June (UV index 11).