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

Interested in knowing the climate of Rio de Janeiro in September? Use this page to get an overview of the month’s weather conditions.

Temperatures

The weather in Rio de Janeiro during September is usually perfect, offering high temperatures and moderate rainfall. During the day, temperatures can climb to about 27°C. At night, they may fall to a cooler 19°C.

Precipitation

Rio de Janeiro in September usually receives moderate rainfall, averaging around 85 mm for the month. You can typically expect 12 days days of rain this month, based on climate records.

Average sunshine

The area enjoys a balanced 144 hours of sunlight, ensuring it's neither too overcast nor too sunny.

So this is a great month to visit if you prefer dry days with pleasant temperatures. May, June, July, August and September typically offer the most optimal weather. In contrast, January and December tend to have less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Rio de Janeiro climate page with graphs.

 

Rio de Janeiro, monthly averages in September

Min Temperature 19°C  

Max Temperature 27°C  

Water Temperature 21°C  

Chance of Rain 38%  

Precipitation 85 mm  

Rainy days 12 days  

Humidity 79%  

Windspeed 11 km/h  

Sunshine 144 hours  

Percentage Sunshine  

Where to go in Brazil in September

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

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case. With a water temperature of around 21°C 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.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Rio de Janeiro.

Our site offers climate and forecast data for every country 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 recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.