Precipitation forecast in June, July and August in eastern Heilongjiang Province.

The precipitation in Heilongjiang province shows obvious monsoon characteristics. Affected by the southeast monsoon in summer, there is abundant precipitation, accounting for about 65% of the annual precipitation; Winter is controlled by the dry and cold northwest wind, which is dry and has little snow, accounting for only 5% of the annual precipitation; Spring and autumn account for 13% and 17% respectively. 65438+ 10 is the least in October and the most in July.

The isoline of the annual average precipitation is roughly parallel to the meridian, indicating that the difference of precipitation between north and south is not obvious, but that between east and west is obvious.

The precipitation is increasing from west to east, only 400-450 mm in the western plain, about 500 mm in the eastern piedmont and 500-600 mm in the eastern mountainous area.

The precipitation in mountainous area is greater than that in plain, and the windward slope is greater than the leeward slope, so the precipitation distribution is extremely uneven. The annual average precipitation in Xiaoxing 'anling and Zhangguangcailing is 550-650 mm, and a rainy center is formed near Yichun in the south of Xiaoxing 'anling and Shangzhi County in the southeast mountainous area, with the precipitation above 650 mm, the precipitation in Songnen Plain in the west is only 400-450 mm, and that in Zhaoyuan West, Tailai and Dorbert Mongolian Autonomous County is below 400 mm, forming a light rain center.

The distribution of precipitation days varies greatly. The Songnen Plain is less than 100 days, 80-90 days in most areas and less than 80 days in some areas. Dumeng (76.7 days), Tailai (73. 1 day) and Longjiang (79 days) are the areas with the least precipitation days in Heilongjiang Province. Most mountainous areas and eastern mountainous areas in Xing 'an are longer than 1 10 days. Wuying (149.2 days) and Yichun (137.7 days) are the areas with the most precipitation days in Heilongjiang Province. The distribution of precipitation days is basically consistent with that of precipitation.

From June to August, the average temperature in the whole province is suitable and the precipitation is abundant, which can meet the needs of honey plants, such as Tilia amurensis, willow, taro, sunflower and buckwheat, and meet the best conditions needed by these plants, which is conducive to the development of honey plants.

Climate disasters have a great impact on agricultural production in the whole province. Mainly cold damage (including frost) and drought and flood. Secondly, strong winds, heavy rains and hail also form disastrous weather.