Manaus Weather in September
In Manaus, September brings very high daytime temperatures around 34°C (93°F), with nights cooling to 25°C (77°F). Expect quite a bit of rainfall this month.
Rainfall in Manaus in September
Expect around 12 days of rain based on historical data, with 136 mm (5.4 in) average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Manaus in September
Daytime temperatures in Manaus reach 34°C (93°F) in September, dropping to 25°C (77°F) at night. Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Manaus in September
The area enjoys a moderate level of sunlight, with around 186 hours. It's a good balance between sunny and cloudy days.
Wind Speed in Manaus in September
Wind speeds average 1 m/s (2 knots) during September. At this speed, you'll experience mostly light air movement that's just barely noticeable. As an average, some days will be completely calm while others have gentle breezes you can feel on your skin.September in Manaus can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options 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 Manaus's climate page.
Manaus Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
34°C (93°F)
Chance of Rain
38%
Precipitation
136 mm (5.4 in)
Rainy days
12 days
Humidity
77%
Windspeed
1 m/s (2 knots)
Sunshine
186 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Manaus typically stay consistent throughout September, with daily highs averaging around 34°C (93°F). Nights are warm, with lows around 24°C (75°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 Manaus in September
Browse day-by-day weather records for Manaus spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Manaus historical weather extremes in September
The extremes listed below come from historical weather data collected in Manaus from 1976 through 2025.
- The hottest September day on record in Manaus reached 39°C (102°F) (September 27, 2023).
- The lowest daytime temperature in September was 25°C (77°F), recorded on September 4, 1984.
- The lowest overnight temperature recorded in September was 20°C (68°F) (September 9, 1990).
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 Manaus 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Manaus 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 Manaus's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Manaus climate overview or explore weather in Brazil.
