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The weather in Hawaii 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 Hawaii 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 Hawaii in September 2025.
If you’re planning to visit Hawaii in the near future, we highly recommend that you review the 14 day weather forecast for Hawaii before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 24° / 22° | 2 | 30 | 0 | 51 mm | Perfect | Hawaii in January |
| February | 24° / 22° | 3 | 25 | 0 | 78 mm | Perfect | Hawaii in February |
| March | 24° / 22° | 4 | 28 | 0 | 97 mm | Perfect | Hawaii in March |
| April | 24° / 23° | 2 | 28 | 0 | 57 mm | Perfect | Hawaii in April |
| May | 25° / 23° | 2 | 29 | 0 | 55 mm | Perfect | Hawaii in May |
| June | 26° / 24° | 1 | 29 | 0 | 43 mm | Perfect | Hawaii in June |
| July | 27° / 25° | 0 | 31 | 0 | 30 mm | Perfect | Hawaii in July |
| August | 27° / 25° | 1 | 30 | 0 | 46 mm | Perfect | Hawaii in August |
| September | 27° / 25° | 2 | 28 | 0 | 50 mm | Perfect | Hawaii in September |
| October | 27° / 25° | 2 | 29 | 0 | 65 mm | Perfect | Hawaii in October |
| November | 26° / 24° | 2 | 28 | 0 | 54 mm | Perfect | Hawaii in November |
| December | 25° / 23° | 3 | 28 | 0 | 85 mm | Perfect | Hawaii in December |