Data were obtained for 1,894 3-hour periods during 1986 in Charlotte, North Carolina, to assess the relationship between domestic dispute calls to police and the THI, a measure of the body's reaction to temperature and humidity. Results indicated that time periods defined as being primarily for discretionary versus obligatory activities produced a higher number of domestic disputes. The 6-hour lag of the THI, however, modified the level of domestic disputes expected for a specific time period. During 1986, the mean number of domestic dispute calls to police was 7.49 for every 3 hours. Highest dispute levels occurred between late spring and early fall, with the peak in June. The hour/THI/weekend dichotomy had a significant effect on variations in domestic disputes. Recommendations to enhance police response to domestic dispute calls are offered. 24 references and 6 tables