Click on a day for an hourly weather forecast
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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 24° / 22° | 2 | 30 | 0 | 51 mm | Perfect | Honolulu in January |
| February | 24° / 22° | 3 | 25 | 0 | 78 mm | Perfect | Honolulu in February |
| March | 24° / 22° | 4 | 28 | 0 | 97 mm | Perfect | Honolulu in March |
| April | 24° / 23° | 2 | 28 | 0 | 57 mm | Perfect | Honolulu in April |
| May | 25° / 23° | 2 | 29 | 0 | 55 mm | Perfect | Honolulu in May |
| June | 26° / 24° | 1 | 29 | 0 | 43 mm | Perfect | Honolulu in June |
| July | 27° / 25° | 0 | 31 | 0 | 30 mm | Perfect | Honolulu in July |
| August | 27° / 25° | 1 | 30 | 0 | 46 mm | Perfect | Honolulu in August |
| September | 27° / 25° | 2 | 28 | 0 | 50 mm | Perfect | Honolulu in September |
| October | 27° / 25° | 2 | 29 | 0 | 65 mm | Perfect | Honolulu in October |
| November | 26° / 24° | 2 | 28 | 0 | 54 mm | Perfect | Honolulu in November |
| December | 25° / 23° | 3 | 28 | 0 | 85 mm | Perfect | Honolulu in December |