<P> The Pacific High , and with it the trade - wind zone , moves north and south with changing angle of the sun , so that it reaches its northernmost position in the summer . This brings trade winds during the period of May through September , when they are prevalent 80 to 95 percent of the time . From October through April , the heart of the trade winds moves south of Hawaii ; however , the winds still blow much of the time . They provide a system of natural year - long ventilation throughout the islands and bring mild temperatures characteristic of air that has moved great distances across tropical waters . </P>
<P> The Pacific High , and with it the trade - wind zone , moves north and south with changing angle of the sun , so that it reaches its northernmost position in the summer . This brings trade winds during the period of May through September , when they are prevalent 80 to 95 percent of the time . From October through April , the heart of the trade winds moves south of Hawaii ; however , the winds still blow much of the time . They provide a system of natural year - long ventilation throughout the islands and bring mild temperatures characteristic of air that has moved great distances across tropical waters . </P>
when do the trade winds blow in hawaii
when do the trade winds blow in hawaii
May through September
May through September