What does "peach blossom rain" mean?

In the peach blossom season in Hubei Province in March every year, there are often continuous spring rains, with little rainfall but a long duration. When the rain stops, the peach blossoms will soon wither. Peach blossoms are beautiful every year, but they are always hard to see because of the rain. For many years, this rain has been called peach blossom rain.