Ji'an's spring brings mild temperatures, gradually warming up from the low of 10°C in February to a high of 25°C by May. By April, temperatures range from 18°C to 26°C, while May averages around 23°C. Summer is hot and humid, with June reaching highs of 32°C and lows of 22°C. Autumn is relatively mild, with September averaging around 20°C. Winters are cool, with January temperatures ranging from 2°C to 10°C.