Click on a day for an hourly weather forecast
The weather in Boa Vista in September is very hot. The average temperatures are between 26°C and 27°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in Boa Vista 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 Boa Vista in September 2025.
If you’re planning to visit Boa Vista in the near future, we highly recommend that you review the 14 day weather forecast for Boa Vista before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 23° / 21° | 0 | 31 | 0 | 1 mm | Perfect | Boa Vista in January |
| February | 22° / 20° | 0 | 28 | 0 | 5 mm | Good | Boa Vista in February |
| March | 21° / 20° | 0 | 31 | 0 | 3 mm | Good | Boa Vista in March |
| April | 22° / 21° | 0 | 30 | 0 | 3 mm | Good | Boa Vista in April |
| May | 22° / 22° | 0 | 31 | 0 | 5 mm | Good | Boa Vista in May |
| June | 23° / 22° | 0 | 30 | 0 | 3 mm | Perfect | Boa Vista in June |
| July | 24° / 23° | 0 | 31 | 0 | 6 mm | Perfect | Boa Vista in July |
| August | 26° / 25° | 1 | 30 | 0 | 48 mm | Perfect | Boa Vista in August |
| September | 27° / 26° | 3 | 27 | 0 | 70 mm | Perfect | Boa Vista in September |
| October | 27° / 26° | 1 | 30 | 0 | 28 mm | Perfect | Boa Vista in October |
| November | 25° / 24° | 0 | 30 | 0 | 5 mm | Perfect | Boa Vista in November |
| December | 24° / 23° | 0 | 31 | 0 | 5 mm | Perfect | Boa Vista in December |