A peculiarity of weather in Hawaii is that the temperature oscillates very little. Therefore, there is no extreme changes of temperature during the year, making it a good place to visit at any time.
There are really only two seasons in Hawaii: Summer (called Kau in Hawaiian) from May to October and winter (Hooilo) from November to April.
Rainbows are a registered trademark of Hawaii, so he is also known as Rainbow State, if you spend a week is very likely to see one.
This happens because of the short rainfall that occur, but do not be alarmed when the rain falls, it usually only last a few minutes and are great for cooling off. See a rainbow is so common that they were even stop in the plates of the cars.
Average Temperature at Sea Level:
Winter (November - April)
- 78 ° (25.6º C)
Summer (May - October)
- 85 ° F. (29,4 º C)