Weather in Manaus in September 2025
Average weather
Average temperature in Manaus in September
Going from a maximum of +99°F during the day to a minimum of +75°F during the night, the temperature in September averages around +95°F.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +97°F to +97°F.
Is Manaus warm or cold in September?
Manaus is typically hot in September.
Maximum temperatures go up compared to the previous month from +90°F to +90°F. The minimum temperature also goes up from +75°F to +77°F.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
September is one of the warmest months in Manaus, here is the comparison with other months:
Climate in Manaus in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +90°F | +90°F | +90°F | ||||
| Min. temperature | ||||||
| +70°F | +70°F | +70°F | ||||
| Max. temperature | ||||||
| +97°F | +100°F | +100°F | ||||
| Rainfall | ||||||
| 100 mm | 124 mm | 153 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 81% | 81% | 82% | ||||
| Air pressure | ||||||
| 1011 HPa | 1010 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 4 | 3 | 2 | ||||
| Cloudy days | ||||||
| 1 | 1 | 2 | ||||
| Rainy days | ||||||
| 20 | 19 | 20 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. The temperature levels stay the same in the area of +90°F for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 100 mm to 124 mm. Humidity levels don’t change as the month goes on, averaging around 81%. The average wind speed doesn’t change much during September, staying around 1 m/s. The days becoming less sunny, going from 4 sunny days in August to 3 in September.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Manaus is gradually increasing during September, going from 1 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Manaus?
Climate Change Over the Years
The climate in Manaus in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1989 (+85°F) and the highest in 2020 (+89°F). The driest year was 1980 with only 2148 mm of rainfall, and the wettest year was 2008 with 3331 mm.
FAQ
Is September a good time to visit Manaus?
Can you sunbathe in Manaus in September?
Is Manaus rainy in September?
Is it sunny in Manaus in September?
Other cities in Brazil
Monthly weather in Manaus
Source of the data
For this page, we’ve looked at the typical weather in Manaus, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.