The relationship between surface-level observations of daily maxima in ozone (O3 max) volume mixing ratio and ambient air temperature (Tmax) has been studied at an urban site, i.e. Pune (18.4°N, 73.8°E), India during 2003-04. The mixing ratios of O3 max were found to be highest during winter to pre-monsoon period and lowest in the monsoon season. The dependence of O3 max levels on Tmax has been quantified using the linear regression fit for the different seasons. However, except for the monsoon season, reasonably good correlations between O3 max and Tmax were noticed. The correlation between daily O3 max concentration and minimum NOx (NOx min) concentration was also studied to assess the importance of photochemical mechanism mainly reduction in the loss due to titration. Overall, the strong dependencies of O3 max on Tmax and NOx min signify the role of both meteorological and photochemical processes during most months of a year. The positive slopes of ΔO3 max/ΔTmax and ΔO3 max/ΔNOx min clearly indicate the role of significant production and accumulation of O3 under high temperature and low NOx conditions respectively, during winter and premonsoon seasons. The statistical analysis of O3 in relation with the key meteorological and chemical parameters is important to understand the sensitivity of secondary pollutants on various controlling factors.