The weather in Honolulu in September is very hot. The average temperatures are between 25°C and 27°C, drinking water regularly is advisable.
You can expect a few rainy days in Honolulu during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Honolulu in September 2025.
If you’re planning to visit Honolulu in the near future, we highly recommend that you review the 14 day weather forecast for Honolulu before you arrive.
Temperatures
27° / 25°
Rainy Days
2
Snowy Days
0
Dry Days
28
Rainfall
50
mm
Sun Hours
11.8
Hrs
