I am going to Beijing in April 2013 what will the temperature be?

I am going on a cruise in March 2013 visiting numerous places on the way (Including Australia,, Hong Kong, Taiwan, Kagoshima (Japan), South Korea, Dalian (China), Shanghai) finishing off in Peking where we are spending 5 days touring but wondered what the temperature would be like & what type of clothes to pack? Thanks in advance for your help.