Rio de Janeiro in september: average Weather, Temperature and Climate
Weather in Rio de Janeiro in september 2025
The weather in Rio de Janeiro in the month of september comes from statistical datas on the past years. You can view the weather statistics for all the month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 6
Weather at 6am
70°F
Clear/Sunny
44% of time
22%
20%
7%
Weather at 12pm
81°F
Clear/Sunny
52% of time
21%
18%
6%
Weather at 6pm
74°F
Clear/Sunny
46% of time
25%
17%
7%
Weather at 3am
70°F
46%
21%
17%
9%
Evolution of daily average temperature and precipitation in Rio de Janeiro in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Rio de Janeiro in september.
The climate of Rio de Janeiro in september is good
The climate in september in Rio de Janeiro is rather dry (with 4.4in of precipitation over 7 days). The situation is deteriorating compared to the previous month since in august there is an average of 2.7in of rainfall over 4 days.
The climate quite enjoyable in this city this month. The high seasonal norm is 81°F. On average, the recorded minimum temperature is 70°F. Thus, the mean temperature average on this month of september in Rio de Janeiro is 76°F. Note that seasonal normals in contrast with those observed in Rio de Janeiro in september with a maximum record of 101°F in 2020 and a minimum record of 61°F in 2011. You can expect to have about 6 days with temperatures over 86°F, or 20 of the month.
Day length in Rio de Janeiro in september is 11:58. The sun rises at 05:49 and sets at 17:47.
With a good weather, the month of september is a good time to go in this city in Brazil.
Seasonal average climate and temperature of Rio de Janeiro in september
Check below seasonal norms These statistics are compiled from the weather statements earlier years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 76°F | ||||
| Highest temperature | 81°F | ||||
| Lowest temperature | 70°F | ||||
| Highest record temperature | 101°F (2020) | ||||
| Lowest record temperature | 61°F (2011) | ||||
| Number of days at +86°F | 6 day(s) (20%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 71°F | ||||
| Lowest sea temperature | 68°F | ||||
| Highest sea temperature | 74°F | ||||
| Wind | |||||
| Wind speed | 17km/h | ||||
| Wind temperature | 70°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.4in | ||||
| Number of days with rainfall | 7 day(s) (22%) | ||||
| Record daily rainfall | 2.5in (2020) | ||||
| Other climate data | |||||
| Humidity | 85% | ||||
| Visibility | 9.38km | ||||
| Cloud cover | 34% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:49 | ||||
| Time of sunset | 17:47 | ||||
| Length of day | 11:58 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Rio de Janeiro in september 2024:
67°F to 83°F
70°F to 77°F
70°F to 77°F
67°F to 81°F
68°F to 88°F
70°F to 74°F
68°F to 81°F
72°F to 85°F
70°F to 85°F
68°F to 86°F
74°F to 92°F
74°F to 92°F
76°F to 92°F
76°F to 94°F
74°F to 81°F
70°F to 79°F
68°F to 70°F
67°F to 76°F
65°F to 77°F
68°F to 83°F
70°F to 83°F
70°F to 83°F
72°F to 85°F
72°F to 85°F
72°F to 88°F
74°F to 92°F
77°F to 86°F
70°F to 72°F
70°F to 77°F
67°F to 83°F
Map: other cities in Brazil in september
Cities near Rio de Janeiro:
| Petropolis in september | good weather |
| Itaguai in september | good weather |
| Araruama in september | good weather |
| Ilha Grande in september | good weather |
| Angra dos Reis in september | good weather |
| Cabo Frio in september | good weather |
| Macaé in september | perfect weather |
| Paraty in september | good weather |
| Trindade in september | good weather |
| Campos dos Goytacazes in september | perfect weather |
| Caraguatatuba in september | good weather |
| Ouro Preto in september | good weather |
Click over cities on the map for information about the weather in september.
Rio de Janeiro
perfect weather
good
tolerable
bad
very bad
Weather data for Rio de Janeiro in september:
Weather data for Rio de Janeiro for september are derived from an average of the weather forecast since 2009 in Rio de Janeiro. There is a margin of error and these forecasts are to be considered as general information only. The weather in Rio de Janeiro can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Rio de Janeiro.