Weather in Belem in September 2025
Average weather
Average temperature in Belem in September
Going from a maximum of +93°F during the day to a minimum of +75°F during the night, the temperature in September averages around +91°F.
The average maximum temperature goes up 10% by the end of the month, compared with the beginning of the month, from +90°F to +91°F.
Is Belem warm or cold in September?
Belem is typically hot in September.
Maximum temperatures go up compared to the previous month from +88°F to +90°F. The minimum temperature also goes up from +75°F to +75°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 Belem, here is the comparison with other months:
Climate in Belem in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +88°F | +90°F | +90°F | ||||
| Min. temperature | ||||||
| +72°F | +72°F | +70°F | ||||
| Max. temperature | ||||||
| +95°F | +95°F | +95°F | ||||
| Rainfall | ||||||
| 37 mm | 26 mm | 26 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 80% | 79% | 78% | ||||
| Air pressure | ||||||
| 1011 HPa | 1011 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 5 | 5 | 3 | ||||
| Cloudy days | ||||||
| 3 | 5 | 9 | ||||
| Rainy days | ||||||
| 17 | 15 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting warmer as September arrives. The average maximum temperature goes up from +88°F to +90°F during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 37 mm to 26 mm. It feels drier, as humidity decreases from 80% to 79%. The average wind speed doesn’t change much during September, staying around 2 m/s. The amount of sunny days stay about the same, averaging 5 sunny days during the month.
October brings much the same weather, it remains good.
Wind
The average wind speed is 4 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Belem is gradually increasing during September, going from 4 m/s to 4 m/s over the course of the month.
Rain
How was the weather last September in Belem?
Climate Change Over the Years
The climate in Belem in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1985 (+85°F) and the highest in 2020 (+89°F). The driest year was 1983 with only 1142 mm of rainfall, and the wettest year was 2009 with 2785 mm.
FAQ
Is September a good time to visit Belem?
Can you sunbathe in Belem in September?
Is Belem rainy in September?
Is it sunny in Belem in September?
Other cities in Brazil
Monthly weather in Belem
Source of the data
For this page, we’ve looked at the typical weather in Belem, 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.
