This study investigated the effects of season on malaria parasite prevalence, morbidity in Taraba state, Nigeria. Using a retrospective study design, the study relied on secondary data obtained from Meteorological Station Taraba State and Health facilities from 2005 2014. The research findings showed that season greatly influence malaria transmission. Rainfall plays an important role in the distribution and maintenance of breeding sites for the mosquito vector. The mean rainfall from 2005-2014 were 1885.80mm, per 1000 mean malaria morbidity was 228.90. Years with peak malaria morbidities (years 2006, 2011 and 2014) had least annual rainfalls (1488.20-1677.00mm). Monthly malaria morbidity had a significantly negative linear relationship with rainfall (r = - 0.827, p 0.001). Malaria morbidity for the decade increased at rates 0.298%.This study provide information on the malaria situation in Taraba State which will be useful to the National Malaria Control Programs and publichealth service providers in formulating policies that may promote the mitigation of malaria in Taraba State, Nigeria.