The most pleasant months of the year for Los Arcos are November, March and February. In Los Arcos, there are 3 comfortable months with high temperatures in the range of 70-85°. August is the hottest month for Los Arcos with an average high temperature of 99.5°, which ranks it as one of the hottest places in Texas. Any measurable snowfall is a rare occurance in Los Arcos. The most humid months in Los Arcos are July and June.