河南省属大陆性季风气候,多年平均降水785mm,降水量的分布大致是从南向北递减。降水的季节性强,年内分配不均,大都集中在6～9月份,以洪水形式滔滔而下,形成洪涝灾害。冬春之际则干旱少雨雪,豫北地区非汛期的持续干旱天数多年平均达3个月之久,1998～1999年冬春之交,出现了180多天全省 Henan Province is a continental monsoon climate, with annual average precipitation of 785mm. The distribution of precipitation generally decreases from south to north. Precipitation season is strong, uneven distribution throughout the year, mostly in the 6 ~ September, floods in the form of surging, the formation of floods. During the winter and spring, there was less drought and less snow. The days of prolonged drought in non-flood season in northern Henan averaged over three months for many years. At the turn of winter and spring between 1998 and 1999, more than 180 days