Nakhon Si Thammarat experiences a warm and relatively consistent climate year-round, with temperatures rarely dropping below 20°C or rising above 37°C. The coolest months are January and December, with average highs in the mid-30s, while the warmer months of February to April see temperatures often reaching 37°C. From May to October, the temperature remains steady around 28°C, with a slight decrease in November. June and July can bring more frequent thunderstorms during this period. The dry season, characterized by minimal precipitation, typically lasts from January to May, while the wetter months occur between June and December.