Thermal comfort, influenced by thermal sensation isan important building performance indicator. In the context ofthis work, the applicability of adaptive comfort model (ACM) tosimulatethethermalcomfortlevelinanaturallyventilatedhostel building at Obafemi Awolowo University, Ile-Ife, Nigeriawas investigated. The applicability of ACM was investigated bydetermined the neutral and comfort temperature in addition tocomfortrangetemperatureoftheoccupantsusingtheenvironmentaldataderivedfromfieldmeasurementsandinformationfromquestionnairesurvey.Atotalof288responses participated in the three months short-term thermalcomfort field study. The results obtained were compared withtherecommendationsofASHRAEStandard55,ISO7730Standardandresultsofpreviousfieldstudieslocatedinthewarm-humidtropics.Thepredictedneutraltemperaturewasfoundtobe26.8 o C.Theacceptablerangesofcomforttemperaturearoundthermalneutralitywere24.3-29.3 o Cand23.3-30.3 o Cfor90%and80%acceptability.ThesevaluescloselymatchedtherecommendedrangeofASHRAEStandard 55 and ISO 7730 standard. The results of this studyindicatedthattheuseofACMseemstobepromisingregardingthepredictionofindoorclimaticconditionsundersteady-state non-uniform environments. The study concludedthat the adaptive algorithms are more reliable to evaluate thethermal comfort in naturally ventilated buildings.