Rio de Janeiro Weather: September
 |
Average Day Temperature: | 83.7°F |
|
Average Night Temperature: | 71.6°F |
|
Sea Water Temperature: | 74.5°F |
|
Number of Sunny Days: | 17 days |
| Sunshine Hours: | 11.7 - 12.3 hours | |
|
Number of Rainy Days: | 4 days |
| Precipitation Totals: | 2.6 in | |
| detailed information | ||
forecast
| Rio de Janeiro |
Temperature
| Rio de Janeiro |
Air Temperature in September, °F
The highest day temperature in September 2025 was 100°F. The lowest night temperature was 61°F. The average values for day and night temperatures during September were 79.8°F и 68.8°F respectivly.
Rio de Janeiro Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Rio de Janeiro was 73.7°F. The maximum and minimum values were 72.4°F and 75.2°F respectively.
Most of the days in September are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Rio de Janeiro is 2.6 in.
The average wind speed in September is 7.2 mph. This value is relatively stable throughout the year.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Rio de Janeiro in September is 8.0 hours.
Rio de Janeiro on the Weather Map
| Armacao dos Buzios |  |
+74 |
| Buzios | |
+74 |
| Florianopolis |  |
+68 |
| Fortaleza | |
+80 |
| Itajai | |
+70 |
| Jericoacoara | |
+80 |
| Joao Pessoa | |
+80 |
| Recife | |
+80 |
| Rio de Janeiro | |
+72 |
| Rio Grande | |
+70 |
| Salvador |  |
+80 |
| Santos | |
+72 |
| Sao Paulo | |
+68 |
| Unamar | |
+70 |
| Xangri-la | |
+70 |
| 0300 |  |
70°F | SW 4 mph |
| 0600 |  |
76°F | SW 4 mph |
| 0900 | |
84°F | NW 6 mph |
| 1200 | |
88°F | NW 12 mph |
| 1500 | |
82°F | NW 12 mph |
| 1800 | |
78°F | W 10 mph |
| 2100 | |
76°F | W 8 mph |
| 0000 | |
74°F | SW 3 mph |