Going to Wuhan next year MAR to APRIL 2014, what type of clothing should i bring?

It will be cool in the city then. The average temperature throughout the two months will be around 20C. But there is large temperature gap between daytime and night time, especially in March. It is suggested to take along T-shirt, overcoat in case and jacket (jeans jacket is fine) and jeans as well as one or two pieces of summer clothes for sunny afternoon.