Diamond Head - Kapahulu - St. Louis UV IndexUnited StatesHIHonoluluDiamond Head - Kapahulu - St. Louis1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAADiamond Head - Kapahulu - St. Louis UV forecast issued yesterday at 9:18 am. Next forecast at approx. 9:18 am. UV IndexGet WillyWeather+ to remove ads