01Weather
Rio de Janeiro weather in September
Afternoons in September average 27.4 °C (81 °F) and nights cool to 19.6 °C (67 °F). Compared with August it is 1.3 °C warmer; October is 0.0 °C warmer again.
What the averages hide
| In a typical September | Value | What it means |
|---|---|---|
| Warm afternoons (90th percentile) | 32 °C / 90 °F | one day in ten is at least this warm |
| Cool afternoons (10th percentile) | 22 °C / 72 °F | one day in ten stays below this |
| Cold nights (10th percentile) | 17 °C / 63 °F | one night in ten is colder than this |
| Days above 30 °C (86 °F) | 8.6 | per month, average 2016–2025 |
| Nights at or below 0 °C (32 °F) | 0.0 | frost mornings per month |
| Hottest / coldest September day 2016–2025 | 34.8 °C / 13.5 °C | extremes in the ten-year record |
02Daylight
Sunrise, sunset and the length of the day
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 September | 06:03 | 17:42 | 11.7 h |
| 15 September | 05:49 | 17:46 | 12.0 h |
| 30 September | 05:34 | 17:51 | 12.3 h |
Daylight grows by about 36 minutes over the month. Times are local (America/Sao_Paulo).
03Crowds
How busy Rio de Janeiro is in September
moderate The main sights are moderate in September. What drives it:
- Independence Day on 7 September
- Rock in Rio in some years
- spring begins
04Public holidays
Public holidays in September 2027
| Date | Holiday |
|---|---|
| 7 Sep 2027 | Independence Day |
On public holidays many shops close and museums run on Sunday hours; check opening times for the day before and after as well.
05Events
What's on in Rio de Janeiro in September
Every year in September
| Event | When | Type |
|---|---|---|
| Independence Day | 7 September, military parade | national |
| Rock in Rio | September in even years, Cidade do Rock | music |
07Packing
What to pack for Rio de Janeiro in September
- light, breathable clothing
- sun hat and sunscreen
- refillable water bottle
- a compact umbrella for occasional showers
- something for heat: 9 days a month pass 30 °C on average
08Editor's notes
What the numbers don't tell you
September brings spring warmth, with afternoons around 27 °C, Independence Day on 7 September with a military parade along Avenida Presidente Vargas and Rock in Rio in even years, which fills hotels for two weekends in September. Rain begins to increase late in the month, on about seven days. It remains a pleasant, moderately priced month. The sea is around 22 °C.
The ArtRio fair at the Marina da Glória and the Rio Gastronomia festival fill the calendar. The Christ the Redeemer visibility is still good on most mornings. Daylight passes twelve hours at the equinox. For the warming, humid month with the Film Festival and Children's Day, see October.
09Compare
Rio de Janeiro month by month
| Month | High | Low | Rain days | Sun h | Crowds | Verdict |
|---|---|---|---|---|---|---|
| January | 31 °C | 24 °C | – | – | very busy | Mixed |
| February | 31 °C | 24 °C | – | – | very busy | Mixed |
| March | 31 °C | 23 °C | – | – | busy | Good |
| April | 29 °C | 21 °C | – | – | moderate | Excellent |
| May | 28 °C | 19 °C | – | – | moderate | Excellent |
| June | 27 °C | 18 °C | – | – | moderate | Excellent |
| July | 26 °C | 17 °C | – | – | busy | Excellent |
| August | 26 °C | 18 °C | – | – | moderate | Excellent |
| September | 27 °C | 20 °C | – | – | moderate | Excellent |
| October | 27 °C | 21 °C | – | – | moderate | Excellent |
| November | 28 °C | 22 °C | – | – | moderate | Excellent |
| December | 30 °C | 23 °C | – | – | very busy | Good |
Not sure about September? See the best time to visit Rio de Janeiro.
10Elsewhere
September in nearby cities
| City | High | Rain days |
|---|---|---|
| Buenos Aires in September | 19 °C | 8 |
| Miami in September | 32 °C | 15 |
| Cancún in September | 32 °C | – |
| Orlando in September | 32 °C | 9 |
| Lisbon in September | 27 °C | 4 |
| New York City in September | 26 °C | 6 |
11FAQ
Rio de Janeiro in September: your questions
Is September a good time to visit Rio de Janeiro?
September is one of the best months to visit Rio de Janeiro. Daytime highs average 27 °C (81 °F), and hotel arrivals run above the yearly average, so the main sights are moderate.
What is the weather like in Rio de Janeiro in September?
Expect warm days around 27 °C (81 °F) and nights near 20 °C (67 °F). One September in ten brings afternoons above 32 °C, and one in ten stays below 22 °C.
Does it rain a lot in Rio de Janeiro in September?
September in Rio de Janeiro, by the 1991–2020 station normals.
What should I wear in Rio de Janeiro in September?
Pack light, breathable clothing, sun hat and sunscreen, refillable water bottle.
Is Rio de Janeiro crowded in September?
The main sights are moderate in September. Main drivers: Independence Day on 7 September; Rock in Rio in some years; spring begins.
What time does it get dark in Rio de Janeiro in September?
Around the middle of September the sun sets at about 17:46 and rises at 05:49, giving 12.0 hours of daylight.