Rapid urbanization has changed the urban climate and environment. As a result, many climatic and environmental problems have emerged. Valid urban climatic environment analysis and regulating countermeasures are required in order to cope with and mitigate these issues. An urban climatic map provides important guidance for the planning and regulation of the urban climatic environment. Based on a traditional urban climatic map, this research proposes a new method of building an urban climatic map that considers all seasons and multiple environmental elements. The urban area in Ningbo City, with its complicated underlying surfaces and obvious seasonal climate characteristics, was used as a case study. The technical means, including remote-sensing inversion, spatial analysis of geographical information system (GIS), and mesoscale numerical model simulation, were comprehensively applied to conduct a multi-season analysis and evaluation of the urban thermal load, air pollution, ventilation potential, wind field, and overall urban climatic environment. The results indicate that the spatial distribution of the urban thermal load and air pollutants is characterized by significant seasonal and spatial differences in the principal elements of the formation of an urban climatic environment. Ningbo City is affected by both thermal load and air pollution in spring and summer, affected only by air pollution in the winter, and only slightly affected by both thermal load and air pollution in the autumn. The spatial patterns of ventilation potential are similar in all seasons. Remarkable seasonal and spatial differences are presented, as the wind environment is complex and subject to change. By conducting an overall analysis on urban climatic environments, we found that areas with high and middle values of urban climatic environment are mainly distributed in forests, croplands, and water bodies. Areas with a high risk of urban climatic environment are located in the heavy chemical industrial zones along the coast of Beilun District, Zhenhai District, as well as the southern part of Hangzhou Bay. Areas with an intermediate risk of urban climatic environments are found in the regions where large amounts of industrial factories are clustered, such as the eastern Jiangbei District, eastern and western sides of Yinzhou District, Cixi urban area, and northeast part of the Fenghua urban area. Based on the above analysis, the planning schemes of urban ventilation channels and the regulating countermeasures of climatic environments are further proposed. These include two first-class ventilation channels, five second-class ventilation channels, three third-class bidirectional ventilation channels which are impacted by land-sea breezes, twelve third-class unidirectional ventilation channels which are impacted by land-sea breezes, thirteen third-class unidirectional ventilation channels which are impacted by mountain-valley breezes, and seven types of countermeasures for urban climatic environment regulation. The method of building an urban climatic map considering all seasons and multiple environmental factors raised by this research is applicable to the analysis and evaluation research of the monsoon climate zones with complicated climatic environments. It may also improve urban thermal load and atmospheric environmental quality and ease the problems of urban climatic environments in all seasons. It may do so through ventilation channel planning and formulating and implementing relevant regulatory countermeasures so as to provide support for urban environmental protection, meteorological and planning departments, and promote sustainable urban development and the construction of an ecological city.