Guatemala City's climate is characterized by mild winters and warm summers, with temperatures varying slightly throughout the year. From January to March, temperatures gradually increase, but remain relatively cool, with averages around 18-20°C. The dry season dominates from April to May, with temperatures peaking at 29°C on average. Summer months (June to September) bring stable temperatures around 20°C, while autumn and winter months see a slight decrease in temperature, returning to averages of 18-19°C by December. Overall, the city experiences a relatively consistent climate year-round, with moderate temperatures and humidity levels.