Rio de Janeiro, Brazil

Rio de Janeiro sits under a tropical sky in Brazil, and the 2015–2024 weather record gives its sunshine a clear shape: the June peak reaches a 91/100 sun score, with daytime highs around 25°C — a solid base for a long-weekend city trip.

Across a typical year, afternoon temperatures swing between 25°C (July) and 30°C (February). Rain is most likely in November, when about 50% of days see meaningful rainfall, and least likely in July (19%). The genuinely warm window — average highs of 24°C or better — covers January–December.

The seasonal arc is clear in the data: summer averages 25°C against winter's 30°C, while rain-day odds move from 47% in winter and 36% in spring to 27% in summer and 42% through autumn. That makes summer the statistical sweet spot (season score 90), with spring a workable second; autumn is where the odds thin out. For warmth without the densest crowds, the shoulder play is January: still 30°C highs, with a sun score of 85.

Best months to visit Rio de Janeiro

The best month on record is June — a 91/100 sun score, built on 45% cloud cover and 29% rain-day odds — followed by July and April. In practice you have flexibility — January–December all stay above a 70 sun score. The month to avoid on pure weather odds is November (84/100).

Put against its 126 tropical peers in June, it lands in the sunnier half of the group, ahead of 63% of them.

Month-by-month breakdown for Rio de Janeiro → · More destinations for June →

The live forecast backs this up: of the next 15 days, none look mostly clear and 4 carry meaningful rain risk, in a 20–36°C band. Today's cached sun score is 81/100.