January in Chimaltenango is the windiest and the sunniest month of the year. In January, the weather in Chimaltenango is typically warm. Average daily high temperature in January is about 20 degrees above zero. On average, Chimaltenango has 16 sunny and 15 partly cloudy days in January. January as well as February, March, and December is considered the most comfortable time to visit Chimaltenango.