What is the average temperature in Shanghai and Bejing in late March and April?

Usually, Shanghai will enter Spring in late March, which means the average temperature is above 10degrees more than 5 days. It will enter 20 degree (max temperatur during a day) in early April. It will be cool if it rains, about 15 degrees or cooler. The real spring in Beijing starts in April. The min temperature would be a bit lower than Shanghai at the same time. If the weather is fine, the mx temperature is simillar with Shanghai.