Phra Nakhon Si Ayutthaya experiences a warm climate year-round, with temperatures gradually increasing in the spring months and reaching their peak in April and May. The summer months bring sweltering heat, often exceeding 38°C, but temperatures drop slightly in September and October as the rainy season begins. November marks the start of cooler weather, with temperatures ranging from 22-35°C, while January and December are the coolest months, averaging around 26°C. The temperature fluctuations throughout the year are moderate, with no extreme cold or hot periods. Overall, the climate is relatively consistent, with average temperatures hovering around 28-30°C for most of the year.