Climate Insights for Rio de Janeiro

The climate in Rio de Janeiro is hot. The average annual temperature is 27°C and approximately 384mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. 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, November. The coldest months are April, March, January, 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 26°C. April is the coolest month, with minimum temperatures around 19°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Rio de Janeiro is a quite dry location, receiving approximately 384mm of precipitation annually, which averages out to around 32mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is April, with just 23mm. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Rio de Janeiro is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 7km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 4km/h in winter, 7km/h in spring, 2km/h in summer, 4km/h in autumn.

It is currently winter in Rio de Janeiro, which began on June 21, 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 April near 19°C. Spring is next, beginning on September 23, 2026 — 17 days from now.

The best time to visit Rio de Janeiro is during March and April, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 28mm per month. By contrast, January can be uncomfortably hot with temperatures reaching 30°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

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.