Weather in Rio De Janeiro in September 2024
Average weather
Average temperature in Rio De Janeiro in September
The expected average maximum temperature in September is +75°F with a maximum of +93°F and a minimum of +57°F.
The average maximum temperature goes down 15% by the end of the month, compared with the beginning of the month, from +75°F to +70°F.
Is Rio De Janeiro warm or cold in September?
Rio De Janeiro is typically warm in September.
Maximum temperatures go up compared to the previous month from +77°F to +79°F. The minimum temperature also goes up from +64°F to +66°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Rio De Janeiro:
Climate in Rio De Janeiro in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +77°F | +79°F | +81°F | ||||
| Min. temperature | ||||||
| +55°F | +55°F | +61°F | ||||
| Max. temperature | ||||||
| +99°F | +99°F | +99°F | ||||
| Rainfall | ||||||
| 44 mm | 78 mm | 88 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Humidity | ||||||
| 76% | 76% | 77% | ||||
| Air pressure | ||||||
| 1018 HPa | 1016 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 13 | 9 | 7 | ||||
| Cloudy days | ||||||
| 13 | 14 | 16 | ||||
| Rainy days | ||||||
| 5 | 7 | 8 | ||||
| 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 +77°F to +79°F during the day. Prepare for more rain. Average rainfall goes from 44 mm to 78 mm. Humidity levels don’t change as the month goes on, averaging around 76%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 13 sunny days in August to 9 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 4 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Rio De Janeiro is gradually increasing during September, going from 3 m/s to 4 m/s over the course of the month.
Rain
How was the weather last September in Rio De Janeiro?
Climate Change Over the Years
The climate in Rio De Janeiro in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1983 (+74°F) and the highest in 2020 (+88°F). The driest year was 2017 with only 12 mm of rainfall, and the wettest year was 1983 with 237 mm.
FAQ
Is September a good time to visit Rio De Janeiro?
Can you sunbathe in Rio De Janeiro in September?
Is Rio De Janeiro rainy in September?
Is it sunny in Rio De Janeiro in September?
Other cities in Brazil
Monthly weather in Rio De Janeiro
Source of the data
For this page, we’ve looked at the typical weather in Rio De Janeiro, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
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.