The objective of this study was to determine climatologically suitable places to raise feedlot cattle in Turkey. Daily average temperature, relative humidity and wind speed values for 15 locations (Antalya, Balikesir, Corum, Diyarbakir, Edirne, Elazig, Erzincan, Erzurum, Eskisehir, Isparta, Izmir, Kayseri, Konya, Sivas and Van), spanning last 30 years, were obtained. Daily solar radiation values could not be obtained from the weather stations and were calculated based on a formula that takes hemisphere, latitude and day of the year into account. The comprehensive climate index (CCI) model that enables one to quantify beef cattle performance based on environmental conditions (temperature, relative humidity, wind speed, solar radiation) at any time in the year was used to predict dry matter intake (DMI), average daily gain and feed efficiency of feedlot cattle. Because mostly dairy breed calves are placed into the feedlot in Turkey, Holstein option in CCI was chosen to calculate maintenance energy requirement of cattle. Based on the previous feedlot feeding studies conducted in Turkey, it was assumed that calves would be placed on feed at 250 kg and be marketed at 520 kg, diet would have 2600 kcal/kg metabolic energy and would have dry matter intake of 2.31% of the body weight. Results comparing the 15 locations indicate that cattle raised in Antalya, known to be hottest place and Erzurum, known to be coldest place, had the lowest and highest DMI, respectively (P < 0.05). Environmental conditions in summer lowered cattle DMI in hotter locations and winter conditions increased DMI in colder locations (P < 0.05). Feedlot cattle raised in hotter and colder portion of Turkey had lower average daily gain than other places having a milder climate (P < 0.05). In general, cattle raised in hotter climate had better feed efficiency than those raised in cold climate (P < 0.05).