Izalco's climate is characterized by relatively consistent temperatures throughout the year, with average highs rarely exceeding 38°C. The dry season runs from January to May, with slightly cooler mornings and warmer afternoons, while the rest of the year experiences a slight increase in humidity. Summer months (June to August) see temperatures stabilize around 28°C, with minimal variation between day and night. Autumn and winter months (September to December) bring similar conditions to summer, with temperatures remaining relatively stable but slightly cooler overall.