How many months does the average monthly temperature in Datong fall below 20 degrees? What are the temperature characteristics of Datong? Is the monthly average precipitation in Datong below 100 mm?

Datong is located in the mid-temperate continental semi-arid monsoon climate zone with four distinct seasons. In spring, the temperature rises rapidly, with an average temperature of 7-9℃, sometimes warm and sometimes cold; It is windy and rainy, and the average precipitation is only about 50mm, accounting for 15% of the annual precipitation. Sometimes it melts with flying snow. The summer climate is mild, the average temperature is between 19-22℃, and the rain is concentrated, with an average precipitation of nearly 250mm, accounting for more than 60% of the annual precipitation. Datong is cool and comfortable in summer, with a soft southeast wind. There are more tourists visiting this summer resort than in summer. When autumn comes, the temperature will gradually drop, with an average temperature of 6-8℃. It is often blue and clear in Wan Li. Winter is relatively long, lasting more than four months, with prevailing northwest wind, short days and cold weather. The average temperature is between minus 7- 12℃. The annual sunshine time is long, about 2800 hours, and the utilization potential of light energy is very considerable.

See the table below for detailed data.