hot [hotter, hottest](of the weather) adjective [UK: hɒt] [US: hɑːt]It was a hot day. = Fue un día caluroso.
warm [warmer, warmest](having a temperature slightly higher than usual) adjective [UK: wɔːm] [US: ˈwɔːrm]It seems warm outside. = Se ve caluroso afuera.