Click on a day for an hourly weather forecast
The weather in Apia 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 Apia 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 Apia in September 2025.
If you’re planning to visit Apia in the near future, we highly recommend that you review the 14 day weather forecast for Apia before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 29° / 27° | 11 | 20 | 0 | 348 mm | Ok | Apia in January |
| February | 29° / 27° | 9 | 19 | 0 | 338 mm | Ok | Apia in February |
| March | 29° / 28° | 10 | 22 | 0 | 186 mm | Ok | Apia in March |
| April | 29° / 27° | 10 | 20 | 0 | 220 mm | Ok | Apia in April |
| May | 28° / 27° | 9 | 22 | 0 | 234 mm | Good | Apia in May |
| June | 28° / 27° | 9 | 21 | 0 | 241 mm | Good | Apia in June |
| July | 27° / 26° | 8 | 23 | 0 | 238 mm | Good | Apia in July |
| August | 27° / 26° | 7 | 24 | 0 | 179 mm | Good | Apia in August |
| September | 27° / 26° | 5 | 25 | 0 | 139 mm | Perfect | Apia in September |
| October | 28° / 27° | 9 | 22 | 0 | 234 mm | Good | Apia in October |
| November | 28° / 27° | 9 | 21 | 0 | 252 mm | Good | Apia in November |
| December | 28° / 27° | 8 | 23 | 0 | 281 mm | Good | Apia in December |