Wailuku, HI has a tropical climate with hot and humid conditions for most of the year. Average temperatures range from a high of around 85°F in the summer months to a low of around 64°F in the winter, and average rainfall is generally between 8-9 inches per month. Humidity levels can reach as high as 90%, making for some very muggy conditions. There are occasional periods of moderate winds that can cool things off a bit, but these are usually followed by more humidity. Despite its tropical climate, Wailuku does experience cooler weather during the winter months, when temperatures dip to comfortable levels and rain is less frequent.
Wailuku, Hawaii gets 32 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Wailuku averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 273 sunny days per year in Wailuku. The US average is 205 sunny days.
Wailuku gets some kind of precipitation, on average, 108 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 86 degrees
Winter Low: the January low is 65
Rain: averages 32 inches of rain a year
Snow: averages 0 inches of snow a year