Landfills are responsible for leachate generation and contain a variety of pollutants, which can cause serious pollution of groundwater and other water sources. Variations in leachate characteristics are due to seasonal effects, significantly affecting leachate composition. However, prior knowledge of such parameters at different seasons can minimize the hazardous impacts and be suitable for a proper leachate treatment system. This study shows the effect of seasonal changes on physicochemical parameters and heavy metals of leachate generated by the Nashik City landfill. The results presented in the paper show the rainy season leachate characteristics were increased compared to other seasons due to municipal solid waste mixing in rainwater and percolating into the ground. The research would enable the installation of a more effective seasonal-specific leachate management system by the concerned authorities and field practitioners at such landfills.