Abstract:In the spring (March to May) of 2026, the temperature in most parts of China was higher than normal, with average temperature over China reaching 12.0℃, making this spring the fourth warmest since 1961. The average precipitation over China was 166.3 mm, 15.8% above normal. Spatially, precipitation in central and eastern China presented two main rainfall belts in the north and south. The northern rainfall belt was mainly located from southern North China to the Huanghuai Region, while the southern rainfall belt was from the central-eastern part of Southwest China to the western part of the Jiangnan Region. The 500 hPa geopotential height field over the middle and high latitudes of Eurasia exhibited a “two ridges and one trough” pattern. Positive height anomalies controlled the region from the Ural Mountains to Lake Balkhash and over Northeast Asia, whereas negative height anomalies were centered over Lake Baikal and the central Siberia Area to its north. This circulation pattern facilitated the southward intrusion of cold air along the central and western paths into China. In the lower-tropospheric wind field, Northeast Asia was dominated by an anomalous anticyclonic circulation, favoring the transport of warm and moist water vapor from the western North Pacific to northern China, which combined with the southward-moving cold air, led to significantly above-normal spring precipitation in the area from southern North China to the Huanghuai Region. In addition, the positive phase of the spring North Atlantic tripole served as an important external forcing signal for the formation of the northern rainy belt in the central and eastern parts of China in spring.