What to expect in Rio de Janeiro in September
September is one of the best times to visit Rio de Janeiro. Expect 26° / 19°, manageable crowds at the big attractions and prices close to the yearly average.
Rio de Janeiro weather in September
Typical conditions in Rio de Janeiro during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 26°C 79°F |
|---|---|
| Average low | 19°C 66°F |
| Rainfall | Moderate 35/100 |
| Total rainfall | 87 mm3.4 in |
| Rainy days | 9 |
| Sea temperature | 21°C 70°F |
| Daylight | 11 h 57 min |
| How it feels | Warm and comfortable |
Average highs sit around 26°C with lows near 19°C. Rainfall is moderate; the odd shower is likely.
Crowds & demand
Crowd levels are Moderate for Rio de Janeiro — manageable crowds at the big attractions.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Light layers for 26°C days and something with sleeves for evenings, which cool to around 19°C.
What it costs
Costs in September sit around the yearly average for Rio de Janeiro — neither a bargain nor a squeeze. Booking a few weeks out is usually enough. Compared with the most expensive month of the year, you are looking at roughly 47% less.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
- People who would rather have space than perfect conditions
- Visitors who want to catch a festival
Events & what’s on
Look out for Rock in Rio while you’re there.
- Rock in Rio — Massive rock and pop festival returns to the city every two years.
Rio de Janeiro in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 25° / 17° | Moderate | $$ | 67 |
| August | 26° / 18° | Moderate | $$ | 68 |
| September · This month | 26° / 19° | Moderate | $$ | 68 |
| October | 27° / 20° | Moderate | $$ | 63 |
| November | 28° / 21° | Moderate | $$ | 59 |
These months score higher for Rio de Janeiro on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
