China's agrometeorological disasters online map
of continuous rain frequency during wheat harvest
time in North China was derived from the 《National
Agricultural Atlas of the People's Republic
For three consecutive days, the daily sunshine is ≦6 hours, the total amount of precipitation
is 20 mm, or the daily sunshine is >6 hours. There is precipitation every day and the total
amount is 20 mm for one continuous rain, which is expressed by frequency.
Wheat harvest period: I. June 11-25 II. June 1-15 III. May 22-June 5.