Hawaii weather in September
Averages for 2 places in Hawaii in September, from 30 years of weather data.
Holiday weather in September
Excellent
Best time to visit: January – December
Places in Hawaii in September
Sorted by holiday weather score. Each place links to its own page for September.
| Place | Score | Day | Night | Sea | Sun | Rain days |
|---|---|---|---|---|---|---|
| Kihei, Maui | 96 | 29° | 24° | 27° | 8 h | 2 |
| Honolulu | 96 | 28° | 25° | 27° | 9 h | 6 |
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 97 | 96 | 94 |
| Day | 29° | 29° | 28° |
| Night | 25° | 25° | 24° |
| Sea | 27° | 27° | 27° |
| Sun | 9 h | 9 h | 8 h |
| Rain days | 5 | 4 | 6 |
Hawaii in September: quick answers
Is it warm in Hawaii in September?
Yes, it is hot. Daytime highs average 29 °C (28–29 °C by place) and nights 25 °C.
Can you swim in Hawaii in September?
Yes. The sea is 27 °C, 27 °C on average.
Where is it warmest in Hawaii in September?
The warmest are Kihei, Maui (29 °C) and Honolulu (28 °C).
Does it rain much in Hawaii in September?
Rarely: 4 rainy days on average. Plus 9 hours of sunshine a day.
Is September a good time to visit Hawaii?
Yes, September is one of the best months, with a holiday weather score of 96 out of 100. Best time overall: January – December.
Hawaii month by month
Hawaii: weather by monthWhere to go in SeptemberSea temperature in September
More islands & regions
USA: all destinationsAll islands & regions
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)