Is Huairou earlier than Tongzhou in winter?

Not early. According to the weather information in Huairou, the winter in Huairou is not earlier than that in Tongzhou. Huairou belongs to the semi-humid climate of continental monsoon in warm temperate zone, with four distinct seasons, rain and heat in the same period, warm and humid in summer and cold and little snow in winter. The annual sunshine hours are 2748-2878 hours, the annual average temperature is 9- 13 degrees, and the accumulated temperature is 2800-46 10 degrees. The frost-free period is170-200 days. The average annual precipitation is 600-700 mm, mainly in June-August. Huairou is located in the capital drinking water source protection zone, with over IV rivers 17, 22 large and small reservoirs and 774 mountain springs. The annual total water resources is 860 million cubic meters, accounting for 1/5 of the total water resources in Beijing. The surface water quality reaches the national second-class standard.