What are the possible characteristics of the climate of Tomb-Sweeping Day gas?

It's usually rainy and the temperature is mild. After the Qingming Festival, the temperature rose rapidly.

There are poems as evidence:

Du Mu in Tomb-Sweeping Day

It rained a lot during my stay in Tomb-Sweeping Day.

Pedestrians on the road want to die.

Excuse me, where is the restaurant?

The shepherd boy pointed to Xinghua Village.

Therefore, melon beans should be planted around Tomb-Sweeping Day.