Climate Insights for Rio de Janeiro

The climate in Rio de Janeiro is warm and mild. The average annual temperature is 24°C and approximately 964mm of precipitation falls per year. Rio de Janeiro receives a notable amount of rainfall throughout the year, including during its driest month. Rio de Janeiro is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: January, February, March. The coldest months are August, July, June, when temperatures can drop to 19°C.

Rio de Janeiro sees moderate temperature variation throughout the year, ranging from 19°C to 30°C. The warmest month is January, when average highs reach 30°C and the mean temperature sits around 27°C. August is the coolest month, with minimum temperatures around 19°C and an average of 22°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows.

Rio de Janeiro is a moderately rainy area, receiving approximately 964mm of precipitation annually, which averages out to around 80mm per month. The wettest month is January, averaging 126mm of rainfall. November and March also tend to see above-average precipitation. The driest month is July, with just 30mm. That's 96mm less than January, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Rio de Janeiro is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in June, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.

It is currently autumn in Rio de Janeiro, which began on March 20, 2026. Rio de Janeiro is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in January at around 30°C, while the coldest stretch bottoms out in August near 19°C. Winter is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Rio de Janeiro is during April, May, June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 56mm per month. By contrast, January can be uncomfortably hot with temperatures reaching 30°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Rio de Janeiro based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.