Heyuan's winters are mild, with temperatures rarely dropping below freezing, but can reach highs of around 27°C in January and December. As spring approaches, temperatures gradually rise, reaching an average high of 36°C by April, remaining consistent through May and June. Summer months, July to September, experience warm temperatures, averaging above 29°C, although August is slightly cooler than the peak summer month. Autumn brings a slight cooling trend, with temperatures dropping back to around 18°C in November, before rising again in winter. Overall, Heyuan's temperature range is relatively mild throughout the year, with little extreme variation between seasons.