Tumen's climate is characterized by cold winters and mild summers. The winter months of December to February are marked by temperatures ranging from -15°C to -2°C, with January being the coldest at around -12°C. Spring arrives in March, bringing temperatures that slowly rise from 0°C to a high of 5°C, marking a moderate increase. Summer is relatively cool, with June and July averaging around 18-20°C, while autumn sees a gentle decline in temperature from September's 10-15°C to November's 0-5°C. The temperature fluctuations are subtle throughout the year, resulting in a generally temperate climate.