Itaguaí Weather in September
What's the weather like in Itaguaí (Rio de Janeiro) in September 2025?
The climate in Itaguaí during September can be summarized as warm, humid and a little damp.
September is in the spring in Itaguaí and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 17°C (63°F) is normal.
| Daytime temperature | 26.3°C 79.3°F |
|---|---|
| Nightly temperature | 17.3°C 63.1°F |
| Average temperature | 21.8°C 71.2°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 93 mm 3.6 ins |
| Rainy days | 11 days |
| Sea temperature | 21.9°C 71.5°F |
| Humidity | 77% |
| Windspeed | 8.6kph 5 mph |
On average September is the 5th driest month of the year in Itaguaí with around 93mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
September temperatures in Itaguaí
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Itaguaí in September 2025.
Other monthly averages
Best places to visit in September
Itaguaí weather stats
| Hottest month: | February | 31.2°C 88.2°F |
|---|---|---|
| Driest month: | July | 55mm 2.2ins |
| Sunniest month: | June | 6.9hrs |
| Coldest month: | July | 25.4°C 77.7°F |
| Wettest month: | December | 208mm 8.2ins |
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