‹ Kahului (Maui) weather by month
Typical September weather
Kahului (Maui)
Hawaii · September
90° days
71° nights
maybe one rainy day · 12½ hours of daylight · ocean 81°
What to pack
- Swimsuit
- Sunscreen
What September feels like
September is the local secret: school is back, flights are cheap, and the ocean is at its warmest of the year. Aloha Festivals events run around the island, and the county fair sets up next door in Wailuku toward the end of the month — a genuinely local night out.
Real rain shows up maybe one day all month; the rest stay dry. It’s sticky — light fabrics and an afternoon break earn their keep. about 10 afternoons top 90°.
Can you swim?
The ocean runs about 81° — bath-warm.
The numbers
| Typical high | 90° |
|---|---|
| Typical low | 71° |
| Days with real rain | 1 |
| Total rain | 0.5 in |
| Humidity | sticky |
| Water temperature | 81° |
| Sunrise / sunset (mid-month) | 6:13 am / 6:28 pm |