Rio de Janeiro weather in September (Rio de Janeiro State, Brazil)

This month is known as a warm month. The average maximum daytime temperature in Rio de Janeiro in September lies at 25.7°C (78.26°F). The average minimum temperature goes down to around 18.3°C (64.94°F) (often the minimum temperature is noted at night).

Rainfall during September is moderate with an average of 60mm (2.4 inches). There are generally around 12 rainy days. The sun will show itself now and again, with 144 hours of sunshine during the entire month.

 

Rio de Janeiro, monthly averages in September

Show in Fahrenheit

Min Temperature 18 °C  

Max Temperature 25 °C  

Water Temperature 21 °C *  

Chance of Rain 42%  

Precipitation 59mm  

Rainy days 13 days  

Humidity 79% *  

Sunshine 144 hrs *  

Where to stay in Rio de Janeiro

Where to go in Brazil in September

Find out more about the weather in Brazil in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in September? Visitors traveling to Rio de Janeiro might want to wear airy clothing, t-shirts and other summer cloths. Shorts for men made of cotton or linen are good options for staying cool on a hot day. With a water temperature of around 21.0°C (69.8°F), this is a great month to swim so bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming

7/10

Cycling

8/10

Walking

8/10

Camping

8/10

Outdoor sports

8/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Rio de Janeiro.

Our site offers climate and forecast data for almost all countries in the world. Are you going to Brazil? On this website you can find historical weather averages for many cities in Brazil. Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.