Typical September weather
Hilo
Hawaii · September
83° days
70° nights
about 15 rainy days · 12 hours of daylight · ocean 81°
What to pack
- Umbrella
- Swimsuit
- Sunscreen
What September feels like
September is one of the brighter, quieter stretches of the year in Hilo, and the ocean is at its warmest. The Aloha Festivals hoolaulea runs down Kamehameha Avenue, and the tsunami museum on the corner is worth an hour on a wet afternoon — this town's history is written in water.
This is the wet season: rain on about 15 days, so pack accordingly. It’s sticky — light fabrics and an afternoon break earn their keep.
Can you swim?
The ocean runs about 81° — bath-warm.
The numbers
| Typical high | 83° |
|---|---|
| Typical low | 70° |
| Days with real rain | 15 |
| Total rain | 8.7 in |
| Humidity | sticky |
| Water temperature | 81° |
| Sunrise / sunset (mid-month) | 6:07 am / 6:22 pm |