We have mostly sunny days with light rain. A bad day is when it rains all day.
Most of the rain falls on the windward sides of all the islands and in the mountains. The Koolau's get 200 inches of rain a year, so that is where most of our water comes from.
I live in the high central plain created by lava from the two main volcanoes that created the island. It is cooler than the lowlands and relatively wet compared to the dry leeward side.
Except for the garden near sea level, the other plots drain well and subside in a few hours even after flooding rain.
The garden at sea level is in a flood zone and will stay flooded for days. I think I might do more research on hugelkultur. There are logs, tree trimmings, and compost available at that garden to make it work.