Colotenango's climate is mild and temperate, with temperatures ranging from near-freezing in the coldest months to warm in the summer. The winter months of November and December are cool, with average highs around 15°C, while January and February are slightly warmer, averaging 17°C. Spring brings a gradual warming trend, with March and April temperatures rising to an average of 18°C. Summer months from May to August see consistent warm temperatures, peaking in August at up to 34°C, but generally staying around the mid-to-high teens. Autumn sees a gentle cooling, returning to cooler averages by October and November.