Boa Vista Weather in September
Boa Vista in September sees very high daytime temperatures of 33°C (91°F) and nighttime lows of 24°C (75°F). Rainfall is fairly high this month at around 108 mm (4.3 in), so pack a rain jacket to stay dry.
Rainfall in Boa Vista in September
Past climate data indicates that roughly 14 days will see rain, totalling around 108 mm (4.3 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Boa Vista in September
September in Boa Vista brings very high temperatures, with highs of 33°C (91°F) and nights around 24°C (75°F). Mornings and evenings are often more comfortable than the peak afternoon hours. Nights stay warm at around 24°C (75°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Boa Vista in September
The days are predominantly sunny, with an estimated total of around 201 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.September in Boa Vista has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Brazil, check out our Boa Vista's climate page.
Boa Vista Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
33°C (91°F)
Chance of Rain
48%
Precipitation
108 mm (4.3 in)
Rainy days
14 days
Humidity
76%
Sunshine
201 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Boa Vista typically stay consistent throughout September, with daily highs averaging around 33°C (91°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Boa Vista in September
Browse day-by-day weather records for Boa Vista spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Boa Vista historical weather extremes in September
The extremes listed below come from historical weather data collected in Boa Vista from 1976 through 2025.
- The warmest day in September was on September 1, 2012, with a maximum of 40°C (104°F).
- Boa Vista experienced its chilliest September day on September 6, 1981, reaching only 24°C (75°F).
- The coldest night in September in Boa Vista was on September 14, 2013, with a minimum of 11°C (52°F).
Best Places in Brazil in September
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Boa Vista in September
Hot weather in September means keeping cool is the priority. Loose-fitting clothes in natural fabrics work best. Pack plenty of shorts, tank tops, and breathable shirts. Don't forget a hat, swimwear, and comfortable sandals. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Boa Vista in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Brazil, check out our Boa Vista's climate page.
Temperature Rainfall Sunshine Humidity
See the full Boa Vista climate overview or explore weather in Brazil.
