September · Brazil
Best time to visit Rio de Janeiro in September Weather, crowds & prices
Weather in Rio de Janeiro in September
Average temperature 23°C, 46 mm of rain, about 26 days with 6+ hours of sunshine and 77% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.2/10
Ranked #2 of 12 months
- Avg temp
- 23°C
- Rainfall
- 46 mm
- Humidity
- 77%
- Days with 6h+ sun
- 26
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Rio de Janeiro scores 9.2/10 for beach and coastal travel - one of the top 12-month picks (#2). Expect around 23°C, 46 mm of rain, and roughly 26 days with 6+ hours of sunshine this month.
Golden shores, verdant peaks, and carnival spirit shine from late summer through Rio's gentle May–September days.
September is one of the strongest months in Rio de Janeiro (2nd)
With 23°C (73°F) on average, September delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
Budget for roughly 46 mm of rain this month — a flexible day or two helps — with about 26 days with 6+ hours of sunshine and 12 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Rio de Janeiro at 9.2/10 (2nd of 12), just behind May at 9.2/10.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
Expect peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Rio de Janeiro in September?
- In September, Rio de Janeiro averages 23°C, 46 mm of rain, and about 26 days with 6+ hours of sunshine. Its climate-comfort score is 9.2/10.
- Is September a good time to visit Rio de Janeiro?
- September earns a 9.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Rio de Janeiro in September?
- Expect about 46 mm of rain in September. Average humidity is 77% and there are about 26 days with 6+ hours of sunshine.
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