Chalchuapa's climate is characterized by a relatively consistent high temperature throughout the year, with averages ranging from 25°C in January to 27°C in March and April. The temperatures are also remarkably stable during the rest of the year, hovering between 26-28°C from May to October. Winters are mild, with lows around 12-15°C, while summers see highs reaching up to 38°C. June and July experience slightly cooler temperatures, with maxima around 35°C. Overall, the region enjoys a pleasant subtropical climate year-round.