Tongliao has a four-season, monsoon-influenced, continental steppe climate. With monthly percent possible sunshine ranging from 57% in July to 78% in January, sunshine is abundant year-round, with 3,054 hours of bright sunshine annually.
Summer is hot and humid. Much of the year's rainfall occurs from June to August, and even then dry and sunny weather dominates in the city.
Tongliao is a railway hub in both Inner Mongolia and Northeast China. Tongliao-Beijing Railway conveniently connects the city with Beijing. There are also rails connect Tongliao with Shenyang, Daqing and Jining. State Highway 111, State Highway 303, State Highway 304 and State Highway 204 run through the city and extend to harbor cities such as Tianjin, Dalian, and Qinhuangdao.