The 10 most alternative cities in South America
Discover South America's top 10 alternative cities! From Valparaíso's vibrant streets to La Paz's high-altitude charm and Medellín's innovative spirit.
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.
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
Boa Vista Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Boa Vista - and find the best time to visit.
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 records 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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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.
-
Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Boa Vista 3-Day Forecast
More climate data for Boa Vista
Temperature Rainfall Sunshine Humidity
See the full Boa Vista climate overview or explore weather in Brazil.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 10 most alternative cities in South America
The 5 most tranquil retreats in the Amazon Rainforest, Brazil
Discover top sustainable lodges in the Amazon. Enjoy unique wildlife, eco-friendly stays, and immersive experiences at Anavilhanas, Cristalino, and more.
Brazil in November: Where Is the Best Weather?
Discover where Brazil has the best weather in November, comparing Fortaleza, Salvador, Rio, São Paulo, Florianópolis, Brasília and Foz do Iguaçu.
An alternative way to discover Rio de Janeiro
Don't feel like seeing the traditional tourist sights in Rio de Janeiro? We have made an overview of the sights in Rio de Janeiro that you must see if you want to visit Rio in an alternative way.