Click on a day for an hourly weather forecast
The temperatures in Rio De Janeiro in September are comfortable with low of 19°C and and high up to 28°C.
You can expect about 3 to 8 days of rain in Rio De Janeiro during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Rio De Janeiro in September 2025.
If you’re planning to visit Rio De Janeiro in the near future, we highly recommend that you review the 14 day weather forecast for Rio De Janeiro before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 31° / 22° | 15 | 16 | 0 | 340 mm | Ok | Rio De Janeiro in January |
| February | 31° / 22° | 13 | 16 | 0 | 294 mm | Ok | Rio De Janeiro in February |
| March | 30° / 21° | 14 | 17 | 0 | 305 mm | Ok | Rio De Janeiro in March |
| April | 28° / 19° | 7 | 23 | 0 | 136 mm | Good | Rio De Janeiro in April |
| May | 26° / 17° | 4 | 27 | 0 | 110 mm | Perfect | Rio De Janeiro in May |
| June | 25° / 16° | 4 | 26 | 0 | 93 mm | Perfect | Rio De Janeiro in June |
| July | 26° / 16° | 4 | 27 | 0 | 71 mm | Perfect | Rio De Janeiro in July |
| August | 26° / 17° | 4 | 27 | 0 | 76 mm | Perfect | Rio De Janeiro in August |
| September | 28° / 19° | 6 | 24 | 0 | 124 mm | Perfect | Rio De Janeiro in September |
| October | 28° / 20° | 9 | 22 | 0 | 200 mm | Good | Rio De Janeiro in October |
| November | 28° / 20° | 14 | 16 | 0 | 364 mm | Good | Rio De Janeiro in November |
| December | 29° / 21° | 14 | 17 | 0 | 335 mm | Ok | Rio De Janeiro in December |