Typical September weather
Honolulu
Hawaii · September
88° days
75° nights
about 2 rainy days · 12½ hours of daylight · ocean 81°
What to pack
- Swimsuit
- Sunscreen
What September feels like
Aloha Festivals run through the month, ending with the block party and floral parade on Kalakaua. Kids are back in school and the mainland flights thin out, so this is the month residents recommend to friends who ask when to visit.
Real rain shows up about 2 days all month; the rest stay dry. It’s sticky — light fabrics and an afternoon break earn their keep. about 9 afternoons top 90°.
Can you swim?
The ocean runs about 81° — bath-warm.
The numbers
| Typical high | 88° |
|---|---|
| Typical low | 75° |
| Days with real rain | 2 |
| Total rain | 0.9 in |
| Humidity | sticky |
| Water temperature | 81° |
| Sunrise / sunset (mid-month) | 6:18 am / 6:34 pm |