In Boli, China's spring season brings mild temperatures, with March averaging around 5°C. April sees a slight increase in warmth, with temperatures ranging from 6-9°C. May is cooler again, with averages of 2-5°C. Summer months are short and cool, with June experiencing highs around 10-12°C. Autumn is relatively chilly, with September's average temperature ranging from -2 to 4°C.