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.
Temperatures
27° / 26°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
139
mm
Sun Hours
10.8
Hrs