Typical May weather
Hilo
Hawaii · May
81° days
67° nights
about 14 rainy days · 13 hours of daylight · ocean 78°
What to pack
- Umbrella
- Swimsuit
- Sunscreen
What May feels like
May is the best window for actually seeing the mountains; Mauna Kea and Mauna Loa spend most of the year behind cloud. Lei Day on the first is a proper local celebration here, and the graduation lei stacked around students' necks get comical by the end of the month.
This is the wet season: rain on about 14 days, so pack accordingly. It’s sticky — light fabrics and an afternoon break earn their keep.
Can you swim?
The ocean runs about 78° — bath-warm.
The numbers
| Typical high | 81° |
|---|---|
| Typical low | 67° |
| Days with real rain | 14 |
| Total rain | 7.0 in |
| Humidity | sticky |
| Water temperature | 78° |
| Sunrise / sunset (mid-month) | 5:44 am / 6:48 pm |